CoP: Co-expressed Biological Processes

Microarray experiments to specifically-expressed genes

GSM ID GSM218595

Assay name Whole roots 3.5hr KNO3 treated then frozen, biological rep2

GSE experiment GSE7631: Cell-specific nitrogen responses in the Arabidopsis root

Click Gene ID to show a list of GSM assays in which the gene are specifically expressed.

Std2 GX %ile Std GX Gene ID Repr. ID Gene name Functional description O.I. C.G. H.G. Other DB
1092.5 100.0 156.4 At1g65680 842879 ATEXPB2 (ARABIDOPSIS THALIANA EXPANSIN B2) member of BETA-EXPANSINS. Naming convention from the Expansin Working Group (Kende et al, 2004. Plant Mol Bio) O.I. C.G. H.G.
448.1 100.0 405.7 At2g19990 816518 PR-1-LIKE (PATHOGENESIS-RELATED PROTEIN-1-LIKE) Encodes a PR-1-like protein homolog that is differentially expressed in resistant compared to susceptible cultivars by powdery mildew infection. The deduced amino acid sequence has 24 amino acids comprising the signal peptide and 140 amino acids of the mature peptide (15 kDa). Northern blot analysis showed accumulation of the corresponding mRNA 12 h after inoculation of resistant barley cultivars with Erysiphe graminis. Though the Genbank record for the cDNA associated to this gene model is called 'PR-1', the sequence actually corresponds to PR-1-like. Expression of this gene is not salicylic-acid responsive. O.I. C.G. H.G.
339.2 100.0 129.0 At5g14650 831317 polygalacturonase, putative / pectinase, putative F:polygalacturonase activity;P:carbohydrate metabolic process;C:endomembrane system;FPBOMA O.I. C.G. H.G.
264.8 100.0 176.5 At4g19750 827719 glycosyl hydrolase family 18 protein F:cation binding, hydrolase activity, hydrolyzing O-glycosyl compounds, chitinase activity, catalytic activity;P:carbohydrate metabolic process;C:cellular_component unknown;MBFOVPA O.I. C.G. H.G.
233.9 100.0 387.4 At2g19970 816516 pathogenesis-related protein, putative F:molecular_function unknown;P:biological_process unknown;C:extracellular region;MPFBO O.I. C.G. H.G.
183.3 100.0 270.0 At2g30670 817617 tropinone reductase, putative / tropine dehydrogenase, putative F:oxidoreductase activity, binding, catalytic activity;P:metabolic process;C:cellular_component unknown;BOMFPAV O.I. C.G. H.G.
158.1 99.9 137.1 At2g29870 817537 major intrinsic family protein / MIP family protein F:water channel activity;P:transport;C:membrane;BPMOFA O.I. C.G. H.G.
116.2 99.9 250.4 At1g67750 843100 pectate lyase family protein F:pectate lyase activity;P:biological_process unknown;C:endomembrane system;BPFO O.I. C.G. H.G.
115.9 99.9 106.7 At5g41280 834129 - F:molecular_function unknown;P:biological_process unknown;C:anchored to plasma membrane, anchored to membrane;P O.I. C.G. H.G.
114.0 99.9 47.8 At2g30660 817616 3-hydroxyisobutyryl-coenzyme A hydrolase, putative / CoA-thioester hydrolase, putative F:catalytic activity;P:metabolic process;C:unknown;BOMFPA O.I. C.G. H.G.
111.4 99.9 83.9 At2g41850 818785 PGAZAT (POLYGALACTURONASE ABSCISSION ZONE A. THALIANA) ADPG2. O.I. C.G. H.G.
104.6 99.9 103.9 At4g31730 829301 GDU1 (GLUTAMINE DUMPER 1) Glutamine dumper1 is a putative transmembrane protein. It is involved in glutamine secretion O.I. C.G. H.G.
98.7 99.9 494.6 At4g30140 829137 GDSL-motif lipase/hydrolase family protein F:hydrolase activity, acting on ester bonds, carboxylesterase activity;P:lipid metabolic process;C:endomembrane system;PBOFM O.I. C.G. H.G.
95.2 99.9 28.2 At2g02580 814788 CYP71B9 member of CYP71B O.I. C.G. H.G.
92.5 99.9 248.9 At5g66985 836833 unknown protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
89.0 99.9 93.3 At3g12230 820403 scpl14 (serine carboxypeptidase-like 14) F:serine-type carboxypeptidase activity;P:proteolysis;C:endomembrane system;PMFOB O.I. C.G. H.G.
87.4 99.9 98.4 At5g22555 832318 unknown protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
76.6 99.9 421.6 At4g33070 829444 pyruvate decarboxylase, putative F:in 6 functions;P:unknown;C:membrane;BOFPAMV O.I. C.G. H.G.
71.2 99.9 119.2 At1g72360 843568 ethylene-responsive element-binding protein, putative encodes a member of the ERF (ethylene response factor) subfamily B-2 of ERF/AP2 transcription factor family. The protein contains one AP2 domain. There are 5 members in this subfamily including RAP2.2 AND RAP2.12. O.I. C.G. H.G.
69.1 99.9 73.8 At1g50090 841432 aminotransferase class IV family protein F:branched-chain-amino-acid transaminase activity, catalytic activity;P:branched chain family amino acid metabolic process, metabolic process;C:cellular_component unknown;BOFMPA O.I. C.G. H.G.
68.7 99.9 32.9 At4g40070 830170 protein binding / zinc ion binding F:protein binding, zinc ion binding;P:unknown;C:unknown;PMOFV O.I. C.G. H.G.
54.6 99.8 27.9 At3g47980 823953 integral membrane HPP family protein F:molecular_function unknown;P:biological_process unknown;C:integral to membrane, chloroplast;BOFP O.I. C.G. H.G.
50.4 99.8 30.9 At3g46270 823772 receptor protein kinase-related F:molecular_function unknown;P:biological_process unknown;C:plasma membrane;MPBOFVA O.I. C.G. H.G.
46.0 99.8 357.5 At1g08090 837327 ATNRT2:1 (NITRATE TRANSPORTER 2:1) High-affinity nitrate transporter. Up-regulated by nitrate. Functions as a repressor of lateral root initiation independently of nitrate uptake. O.I. C.G. H.G.
45.6 99.8 138.5 At5g39890 833986 unknown protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;PMO O.I. C.G. H.G.
45.4 99.8 21.8 At2g02250 814756 AtPP2-B2 (Phloem protein 2-B2) F:carbohydrate binding;P:N-terminal protein myristoylation;C:cellular_component unknown;P O.I. C.G. H.G.
44.9 99.8 220.0 At3g43190 823393 SUS4 Encodes a protein with sucrose synthase activity (SUS4). O.I. C.G. H.G.
44.8 99.8 41.4 At3g10870 820257 MES17 (METHYL ESTERASE 17) Encodes a methyl IAA esterase. Methyl IAA is believed to be an inactive form of auxin that needs to be demethylated to exert a biological effect. MES17 does not act on methyl JA, MeSA, MeGA4, or MEGA9 in vitro. This gene is expressed in several tissues of seedlings and adult plants, with a higher relative level of expression in the seedling shoot apex and the adult stem. O.I. C.G. H.G.
42.0 99.8 53.6 At1g52140 841644 unknown protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
41.2 99.8 298.1 At1g30510 839930 ATRFNR2 (ROOT FNR 2) Encodes a root-type ferredoxin:NADP(H) oxidoreductase. O.I. C.G. H.G.
39.1 99.8 37.5 At1g68880 843221 AtbZIP (Arabidopsis thaliana basic leucine-zipper 8) F:transcription factor activity, DNA binding;P:regulation of transcription, DNA-dependent;C:nucleus, chloroplast;PMFO O.I. C.G. H.G.
38.6 99.8 109.2 At1g24280 839044 G6PD3 (GLUCOSE-6-PHOSPHATE DEHYDROGENASE 3) Encodes a plastidic glucose-6-phosphate dehydrogenase that is sensitive to reduction by DTT and whose mRNA is most highly expressed in root. O.I. C.G. H.G.
38.3 99.8 45.0 At1g17060 838276 CYP72C1 (CYTOCHROME P450 72C1) Encodes a protein with similarity to other cytochrome P450's and is a homolog of BAS1. Over expression causes a dwarf phenotype resembling brassinolide resistant mutants. Double mutant analysis of sob7/bas1 loss of function mutants suggests these genes have redundant functions in light responsiveness. SOB7 may function in metabolizing brassinolides. Expressed in leaf, root, stem and silique but expression highest in flower and cauline leaves. Dominant overexpressing plants have dwarf phenotype, short siliques/seeds, rounded dark green leaves and short hypocotyls in light and dark. Loss of function alleles result in plants with long hypocotyls. O.I. C.G. H.G.
38.2 99.8 13.3 At1g78360 844172 ATGSTU21 (GLUTATHIONE S-TRANSFERASE TAU 21) Encodes glutathione transferase belonging to the tau class of GSTs. Naming convention according to Wagner et al. (2002). O.I. C.G. H.G.
38.0 99.8 287.6 At1g44800 841044 nodulin MtN21 family protein F:molecular_function unknown;P:unknown;C:membrane;BOPAM O.I. C.G. H.G.
37.8 99.8 356.3 At1g49860 841409 ATGSTF14 Encodes glutathione transferase belonging to the phi class of GSTs. Naming convention according to Wagner et al. (2002). O.I. C.G. H.G.
37.4 99.7 134.5 At3g23190 821897 lesion inducing protein-related F:molecular_function unknown;P:biological_process unknown;C:endoplasmic reticulum;P O.I. C.G. H.G.
37.3 99.7 19.5 At2g47560 819369 zinc finger (C3HC4-type RING finger) family protein F:protein binding, zinc ion binding;P:unknown;C:unknown;PMOFV O.I. C.G. H.G.
37.1 99.7 226.7 At3g02550 821112 LBD41 (LOB DOMAIN-CONTAINING PROTEIN 41) F:unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
34.1 99.7 273.9 At3g14940 820723 ATPPC3 (PHOSPHOENOLPYRUVATE CARBOXYLASE 3) One of four genes encoding phosphoenolpyruvate carboxylase, its mRNA is most abundantly expressed in roots and siliques. O.I. C.G. H.G.
34.0 99.7 306.7 At5g50200 835085 WR3 (WOUND-RESPONSIVE 3) Wound-responsive gene 3 (WR3). Encodes a high-affinity nitrate transporter. Up-regulated by nitrate. Involved in jasmonic acid-independent wound signal transduction. O.I. C.G. H.G.
33.7 99.7 75.6 At4g18340 827561 glycosyl hydrolase family 17 protein F:cation binding, hydrolase activity, hydrolyzing O-glycosyl compounds, catalytic activity;P:carbohydrate metabolic process;C:endomembrane system;PFO O.I. C.G. H.G.
33.6 99.7 382.9 At2g16060 816103 AHB1 (ARABIDOPSIS HEMOGLOBIN 1) Encodes a class 1 nonsymbiotic hemoglobin induced by low oxygen levels with very high oxygen affinity. It is not likely to be a hemoglobin transporter because of its extremely high affinity for oxygen. O.I. C.G. H.G.
33.6 99.7 359.0 At5g13420 831183 transaldolase, putative F:catalytic activity, transaldolase activity;P:response to cadmium ion;C:mitochondrion, chloroplast stroma, chloroplast;BOPMAF O.I. C.G. H.G.
33.6 99.7 37.3 At3g27070 822325 TOM20-1 (translocase outer membrane 20-1) Form of TOM20, which is a component of the TOM complex, involved in transport of nuclear-encoded mitochondrial proteins O.I. C.G. H.G.
32.8 99.7 48.8 At4g13290 826959 CYP71A19 putative cytochrome P450 O.I. C.G. H.G.
32.5 99.7 244.2 At4g39675 830122 unknown protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
32.5 99.7 159.6 At2g18980 816415 peroxidase, putative F:electron carrier activity, peroxidase activity, heme binding;P:response to oxidative stress;C:endomembrane system;PFOBM O.I. C.G. H.G.
32.5 99.7 69.5 At5g10040 830868 unknown protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
32.5 99.7 46.7 At5g10210 830885 - F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
32.0 99.7 64.9 At5g45440 834580 disease resistance protein-related F:ATP binding;P:apoptosis;C:cellular_component unknown;PFB O.I. C.G. H.G.
31.9 99.7 354.3 At2g26400 817180 ATARD3 (ACIREDUCTONE DIOXYGENASE 3) Encodes a protein predicted to belong to the acireductone dioxygenase (ARD/ARD�)family. O.I. C.G. H.G.
31.8 99.7 95.8 At5g56080 835707 NAS2 (NICOTIANAMINE SYNTHASE 2) Encodes a protein with nicotianamine synthase activity. Its transcript levels rise in roots in response to zinc deficiency and rise in leaves in response to elevated levels of zinc. O.I. C.G. H.G.
31.8 99.7 48.5 At2g35380 818105 peroxidase 20 (PER20) (P20) F:electron carrier activity, peroxidase activity, heme binding;P:response to oxidative stress;C:endomembrane system;PFOB O.I. C.G. H.G.
31.1 99.7 74.4 At3g18560 821387 unknown protein F:unknown;P:unknown;C:unknown;P O.I. C.G. H.G.
31.0 99.7 61.4 At3g50350 824197 unknown protein F:molecular_function unknown;P:biological_process unknown;C:chloroplast;P O.I. C.G. H.G.
30.3 99.7 251.9 At3g03270 821303 universal stress protein (USP) family protein / early nodulin ENOD18 family protein F:unknown;P:response to stress;C:plasma membrane, membrane;PFMBO O.I. C.G. H.G.
30.0 99.7 44.2 At4g35150 829667 O-methyltransferase family 2 protein F:methyltransferase activity, O-methyltransferase activity, protein dimerization activity;P:unknown;C:cytosol;PBFMO O.I. C.G. H.G.
29.9 99.7 707.1 At1g77120 844047 ADH1 (ALCOHOL DEHYDROGENASE 1) Catalyzes the reduction of acetaldehyde using NADH as reductant. Requires zinc for activity. Dimer. Anaerobic response polypeptide (ANP). Fermentation. The protein undergoes thiolation following treatment with the oxidant tert-butylhydroperoxide. O.I. C.G. H.G.
29.4 99.7 172.6 At4g10270 826619 wound-responsive family protein F:molecular_function unknown;P:response to wounding;C:unknown;P O.I. C.G. H.G.
28.9 99.7 62.9 At4g33560 829495 unknown protein F:molecular_function unknown;P:biological_process unknown;C:unknown;P O.I. C.G. H.G.
28.1 99.7 69.9 At3g02885 821194 GASA5 (GAST1 PROTEIN HOMOLOG 5) F:unknown;P:response to gibberellin stimulus;C:endomembrane system;P O.I. C.G. H.G.
28.0 99.7 29.1 At1g44050 841006 DC1 domain-containing protein F:unknown;P:intracellular signaling cascade;C:cellular_component unknown;PMO O.I. C.G. H.G.
27.3 99.7 437.6 At5g64100 836531 peroxidase, putative F:electron carrier activity, peroxidase activity, heme binding;P:response to oxidative stress;C:cell wall;PFO O.I. C.G. H.G.
27.3 99.7 95.8 At2g19590 816478 ACO1 (ACC OXIDASE 1) encodes a protein whose sequence is similar to 1-aminocyclopropane-1-carboxylate oxidase O.I. C.G. H.G.
27.3 99.7 84.8 At5g38930 833885 germin-like protein, putative F:manganese ion binding, nutrient reservoir activity;P:biological_process unknown;C:cell wall;PFO O.I. C.G. H.G.
27.1 99.7 38.0 At3g04530 819609 PPCK2 Encodes a second Arabidopsis phosphoenolpyruvate carboxylase kinase gene product with a different expression pattern from PPCK1. Expression of the gene is upregulated by exposure of the plant to light. O.I. C.G. H.G.
27.0 99.7 28.0 At4g32950 829432 protein phosphatase 2C, putative / PP2C, putative F:protein serine/threonine phosphatase activity, catalytic activity;P:biological_process unknown;C:cellular_component unknown;PMOFBV O.I. C.G. H.G.
26.9 99.7 100.6 At4g10500 826642 oxidoreductase, 2OG-Fe(II) oxygenase family protein F:oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, 2-oxoglutarate as one donor, and incorporation of one atom each of oxygen into both donors, oxidoreductase activity;P:secondary metabolic process;C:unknown;POBFM O.I. C.G. H.G.
26.7 99.7 28.1 At3g58190 824988 LBD29 (LATERAL ORGAN BOUNDARIES-DOMAIN 29) This gene contains two auxin-responsive element (AuxRE). O.I. C.G. H.G.
26.4 99.7 20.1 At1g20700 838660 WOX14 (WUSCHEL RELATED HOMEOBOX 14) Encodes a WUSCHEL-related homeobox gene family member with 65 amino acids in its homeodomain. Proteins in this family contain a sequence of eight residues (TLPLFPMH) downstream of the homeodomain called the WUS box. Functions in the shoot meristem organizing center to maintain the stem cells in an undifferentiated state. O.I. C.G. H.G.
26.3 99.7 191.2 At3g02910 821189 - F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;MPBOA O.I. C.G. H.G.
26.0 99.7 242.1 At5g41670 834169 6-phosphogluconate dehydrogenase family protein F:in 6 functions;P:response to fructose stimulus, response to cadmium ion, response to sucrose stimulus, response to glucose stimulus;C:mitochondrion, chloroplast;BOMPFAV O.I. C.G. H.G.
25.8 99.7 32.3 At5g22890 832353 zinc finger (C2H2 type) family protein F:transcription factor activity;P:response to chitin, regulation of transcription;C:intracellular;MOPF O.I. C.G. H.G.
25.6 99.7 97.2 At5g65640 836690 bHLH093 (beta HLH protein 93) F:transcription factor activity, DNA binding;P:regulation of transcription;C:nucleus;PMFO O.I. C.G. H.G.
25.6 99.7 71.2 At5g11920 831065 AtcwINV6 (6-&1-fructan exohydrolase) Encodes a protein with fructan exohydrolase (FEH) activity acting on both inulin and levan-type fructans (1- and 6-FEH). The enzyme does not have invertase activity. O.I. C.G. H.G.
25.6 99.7 53.4 At2g47520 819365 AP2 domain-containing transcription factor, putative encodes a member of the ERF (ethylene response factor) subfamily B-2 of ERF/AP2 transcription factor family. The protein contains one AP2 domain. There are 5 members in this subfamily including RAP2.2 AND RAP2.12. O.I. C.G. H.G.
24.9 99.6 349.9 At2g38380 818419 peroxidase 22 (PER22) (P22) (PRXEA) / basic peroxidase E F:electron carrier activity, peroxidase activity, heme binding;P:response to salt stress;C:plant-type cell wall;PFO O.I. C.G. H.G.
24.7 99.6 79.5 At1g22885 838895 unknown protein F:molecular_function unknown;P:biological_process unknown;C:endomembrane system;P O.I. C.G. H.G.
24.4 99.6 83.9 At1g29020 839776 calcium-binding EF hand family protein F:calcium ion binding;P:unknown;C:endomembrane system;PMOAF O.I. C.G. H.G.
24.4 99.6 31.8 At5g19970 832119 unknown protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
23.9 99.6 113.8 At3g13650 820569 disease resistance response F:molecular_function unknown;P:lignan biosynthetic process, defense response;C:endomembrane system;P O.I. C.G. H.G.
23.8 99.6 21.8 At3g18400 821369 anac058 (Arabidopsis NAC domain containing protein 58) F:transcription factor activity;P:multicellular organismal development, regulation of transcription;C:cellular_component unknown;PO O.I. C.G. H.G.
23.6 99.6 77.7 At2g17850 816295 - F:molecular_function unknown;P:aging;C:endomembrane system;BOPAMF O.I. C.G. H.G.
23.5 99.6 67.2 At3g27170 822336 CLC-B (CHLORIDE CHANNEL B) member of Anion channel protein family O.I. C.G. H.G.
22.6 99.6 62.0 At5g45480 834584 unknown protein F:molecular_function unknown;P:biological_process unknown;C:plasma membrane;P O.I. C.G. H.G.
22.4 99.6 75.6 At5g44920 834522 Toll-Interleukin-Resistance (TIR) domain-containing protein F:transmembrane receptor activity;P:signal transduction, defense response, innate immune response;C:endoplasmic reticulum;PBO O.I. C.G. H.G.
22.2 99.6 19.1 At2g39370 818522 unknown protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;PBMO O.I. C.G. H.G.
21.5 99.6 92.8 At4g00080 828192 UNE11 (unfertilized embryo sac 11) F:enzyme inhibitor activity, pectinesterase inhibitor activity, pectinesterase activity;P:double fertilization forming a zygote and endosperm;C:endomembrane system;P O.I. C.G. H.G.
21.5 99.6 70.6 At4g31910 829321 transferase family protein F:transferase activity, transferring acyl groups other than amino-acyl groups, transferase activity;P:biological_process unknown;C:nucleus;PFBO O.I. C.G. H.G.
21.3 99.6 73.4 At3g03670 821193 peroxidase, putative F:electron carrier activity, peroxidase activity, heme binding;P:response to oxidative stress;C:plant-type cell wall;PFOB O.I. C.G. H.G.
21.3 99.6 23.0 At5g45460 834582 unknown protein F:unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
21.0 99.6 317.6 At4g15390 827205 transferase family protein F:transferase activity, transferring acyl groups other than amino-acyl groups, transferase activity;P:biological_process unknown;C:cellular_component unknown;PFO O.I. C.G. H.G.
21.0 99.6 250.2 At5g20830 832206 SUS1 (SUCROSE SYNTHASE 1) Encodes a protein with sucrose synthase activity (SUS1). O.I. C.G. H.G.
21.0 99.6 73.5 At3g06390 819813 integral membrane family protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P O.I. C.G. H.G.
20.5 99.6 383.2 At1g11580 837701 PMEPCRA (METHYLESTERASE PCR A) F:enzyme inhibitor activity, pectinesterase activity;P:cell wall modification;C:cell wall, plasma membrane, plant-type cell wall;PBFMO O.I. C.G. H.G.
19.7 99.6 22.1 At3g11370 820309 DC1 domain-containing protein F:unknown;P:unknown;C:cellular_component unknown;PFOM O.I. C.G. H.G.
19.5 99.6 54.4 At4g37430 829897 CYP91A2 (CYTOCHROME P450 MONOOXYGENASE 91A2) Encodes a member of the CYP81F cytochrome P450 monooxygenase subfamily. O.I. C.G. H.G.
19.4 99.6 21.3 At4g25090 828612 respiratory burst oxidase, putative / NADPH oxidase, putative F:in 7 functions;P:oxidation reduction;C:cytosolic ribosome, vacuole;MFPBOA O.I. C.G. H.G.
19.3 99.6 16.6 At4g27850 828898 proline-rich family protein F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;MBOFPVA O.I. C.G. H.G.

Std2 GX	%ile	Std GX	Gene ID	Repr. ID	Gene name	Functional description	O.I.	C.G.	H.G.
1092.5	100.0	156.4	At1g65680	842879	ATEXPB2 (ARABIDOPSIS THALIANA EXPANSIN B2)	member of BETA-EXPANSINS. Naming convention from the Expansin Working Group (Kende et al, 2004. Plant Mol Bio)	O.I.	C.G.	H.G.
448.1	100.0	405.7	At2g19990	816518	PR-1-LIKE (PATHOGENESIS-RELATED PROTEIN-1-LIKE)	Encodes a PR-1-like protein homolog that is differentially expressed in resistant compared to susceptible cultivars by powdery mildew infection. The deduced amino acid sequence has 24 amino acids comprising the signal peptide and 140 amino acids of the mature peptide (15 kDa). Northern blot analysis showed accumulation of the corresponding mRNA 12 h after inoculation of resistant barley cultivars with Erysiphe graminis. Though the Genbank record for the cDNA associated to this gene model is called 'PR-1', the sequence actually corresponds to PR-1-like. Expression of this gene is not salicylic-acid responsive.	O.I.	C.G.	H.G.
339.2	100.0	129.0	At5g14650	831317	polygalacturonase, putative / pectinase, putative	F:polygalacturonase activity;P:carbohydrate metabolic process;C:endomembrane system;FPBOMA	O.I.	C.G.	H.G.
264.8	100.0	176.5	At4g19750	827719	glycosyl hydrolase family 18 protein	F:cation binding, hydrolase activity, hydrolyzing O-glycosyl compounds, chitinase activity, catalytic activity;P:carbohydrate metabolic process;C:cellular_component unknown;MBFOVPA	O.I.	C.G.	H.G.
233.9	100.0	387.4	At2g19970	816516	pathogenesis-related protein, putative	F:molecular_function unknown;P:biological_process unknown;C:extracellular region;MPFBO	O.I.	C.G.	H.G.
183.3	100.0	270.0	At2g30670	817617	tropinone reductase, putative / tropine dehydrogenase, putative	F:oxidoreductase activity, binding, catalytic activity;P:metabolic process;C:cellular_component unknown;BOMFPAV	O.I.	C.G.	H.G.
158.1	99.9	137.1	At2g29870	817537	major intrinsic family protein / MIP family protein	F:water channel activity;P:transport;C:membrane;BPMOFA	O.I.	C.G.	H.G.
116.2	99.9	250.4	At1g67750	843100	pectate lyase family protein	F:pectate lyase activity;P:biological_process unknown;C:endomembrane system;BPFO	O.I.	C.G.	H.G.
115.9	99.9	106.7	At5g41280	834129	-	F:molecular_function unknown;P:biological_process unknown;C:anchored to plasma membrane, anchored to membrane;P	O.I.	C.G.	H.G.
114.0	99.9	47.8	At2g30660	817616	3-hydroxyisobutyryl-coenzyme A hydrolase, putative / CoA-thioester hydrolase, putative	F:catalytic activity;P:metabolic process;C:unknown;BOMFPA	O.I.	C.G.	H.G.
111.4	99.9	83.9	At2g41850	818785	PGAZAT (POLYGALACTURONASE ABSCISSION ZONE A. THALIANA)	ADPG2.	O.I.	C.G.	H.G.
104.6	99.9	103.9	At4g31730	829301	GDU1 (GLUTAMINE DUMPER 1)	Glutamine dumper1 is a putative transmembrane protein. It is involved in glutamine secretion	O.I.	C.G.	H.G.
98.7	99.9	494.6	At4g30140	829137	GDSL-motif lipase/hydrolase family protein	F:hydrolase activity, acting on ester bonds, carboxylesterase activity;P:lipid metabolic process;C:endomembrane system;PBOFM	O.I.	C.G.	H.G.
95.2	99.9	28.2	At2g02580	814788	CYP71B9	member of CYP71B	O.I.	C.G.	H.G.
92.5	99.9	248.9	At5g66985	836833	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
89.0	99.9	93.3	At3g12230	820403	scpl14 (serine carboxypeptidase-like 14)	F:serine-type carboxypeptidase activity;P:proteolysis;C:endomembrane system;PMFOB	O.I.	C.G.	H.G.
87.4	99.9	98.4	At5g22555	832318	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
76.6	99.9	421.6	At4g33070	829444	pyruvate decarboxylase, putative	F:in 6 functions;P:unknown;C:membrane;BOFPAMV	O.I.	C.G.	H.G.
71.2	99.9	119.2	At1g72360	843568	ethylene-responsive element-binding protein, putative	encodes a member of the ERF (ethylene response factor) subfamily B-2 of ERF/AP2 transcription factor family. The protein contains one AP2 domain. There are 5 members in this subfamily including RAP2.2 AND RAP2.12.	O.I.	C.G.	H.G.
69.1	99.9	73.8	At1g50090	841432	aminotransferase class IV family protein	F:branched-chain-amino-acid transaminase activity, catalytic activity;P:branched chain family amino acid metabolic process, metabolic process;C:cellular_component unknown;BOFMPA	O.I.	C.G.	H.G.
68.7	99.9	32.9	At4g40070	830170	protein binding / zinc ion binding	F:protein binding, zinc ion binding;P:unknown;C:unknown;PMOFV	O.I.	C.G.	H.G.
54.6	99.8	27.9	At3g47980	823953	integral membrane HPP family protein	F:molecular_function unknown;P:biological_process unknown;C:integral to membrane, chloroplast;BOFP	O.I.	C.G.	H.G.
50.4	99.8	30.9	At3g46270	823772	receptor protein kinase-related	F:molecular_function unknown;P:biological_process unknown;C:plasma membrane;MPBOFVA	O.I.	C.G.	H.G.
46.0	99.8	357.5	At1g08090	837327	ATNRT2:1 (NITRATE TRANSPORTER 2:1)	High-affinity nitrate transporter. Up-regulated by nitrate. Functions as a repressor of lateral root initiation independently of nitrate uptake.	O.I.	C.G.	H.G.
45.6	99.8	138.5	At5g39890	833986	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;PMO	O.I.	C.G.	H.G.
45.4	99.8	21.8	At2g02250	814756	AtPP2-B2 (Phloem protein 2-B2)	F:carbohydrate binding;P:N-terminal protein myristoylation;C:cellular_component unknown;P	O.I.	C.G.	H.G.
44.9	99.8	220.0	At3g43190	823393	SUS4	Encodes a protein with sucrose synthase activity (SUS4).	O.I.	C.G.	H.G.
44.8	99.8	41.4	At3g10870	820257	MES17 (METHYL ESTERASE 17)	Encodes a methyl IAA esterase. Methyl IAA is believed to be an inactive form of auxin that needs to be demethylated to exert a biological effect. MES17 does not act on methyl JA, MeSA, MeGA4, or MEGA9 in vitro. This gene is expressed in several tissues of seedlings and adult plants, with a higher relative level of expression in the seedling shoot apex and the adult stem.	O.I.	C.G.	H.G.
42.0	99.8	53.6	At1g52140	841644	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
41.2	99.8	298.1	At1g30510	839930	ATRFNR2 (ROOT FNR 2)	Encodes a root-type ferredoxin:NADP(H) oxidoreductase.	O.I.	C.G.	H.G.
39.1	99.8	37.5	At1g68880	843221	AtbZIP (Arabidopsis thaliana basic leucine-zipper 8)	F:transcription factor activity, DNA binding;P:regulation of transcription, DNA-dependent;C:nucleus, chloroplast;PMFO	O.I.	C.G.	H.G.
38.6	99.8	109.2	At1g24280	839044	G6PD3 (GLUCOSE-6-PHOSPHATE DEHYDROGENASE 3)	Encodes a plastidic glucose-6-phosphate dehydrogenase that is sensitive to reduction by DTT and whose mRNA is most highly expressed in root.	O.I.	C.G.	H.G.
38.3	99.8	45.0	At1g17060	838276	CYP72C1 (CYTOCHROME P450 72C1)	Encodes a protein with similarity to other cytochrome P450's and is a homolog of BAS1. Over expression causes a dwarf phenotype resembling brassinolide resistant mutants. Double mutant analysis of sob7/bas1 loss of function mutants suggests these genes have redundant functions in light responsiveness. SOB7 may function in metabolizing brassinolides. Expressed in leaf, root, stem and silique but expression highest in flower and cauline leaves. Dominant overexpressing plants have dwarf phenotype, short siliques/seeds, rounded dark green leaves and short hypocotyls in light and dark. Loss of function alleles result in plants with long hypocotyls.	O.I.	C.G.	H.G.
38.2	99.8	13.3	At1g78360	844172	ATGSTU21 (GLUTATHIONE S-TRANSFERASE TAU 21)	Encodes glutathione transferase belonging to the tau class of GSTs. Naming convention according to Wagner et al. (2002).	O.I.	C.G.	H.G.
38.0	99.8	287.6	At1g44800	841044	nodulin MtN21 family protein	F:molecular_function unknown;P:unknown;C:membrane;BOPAM	O.I.	C.G.	H.G.
37.8	99.8	356.3	At1g49860	841409	ATGSTF14	Encodes glutathione transferase belonging to the phi class of GSTs. Naming convention according to Wagner et al. (2002).	O.I.	C.G.	H.G.
37.4	99.7	134.5	At3g23190	821897	lesion inducing protein-related	F:molecular_function unknown;P:biological_process unknown;C:endoplasmic reticulum;P	O.I.	C.G.	H.G.
37.3	99.7	19.5	At2g47560	819369	zinc finger (C3HC4-type RING finger) family protein	F:protein binding, zinc ion binding;P:unknown;C:unknown;PMOFV	O.I.	C.G.	H.G.
37.1	99.7	226.7	At3g02550	821112	LBD41 (LOB DOMAIN-CONTAINING PROTEIN 41)	F:unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
34.1	99.7	273.9	At3g14940	820723	ATPPC3 (PHOSPHOENOLPYRUVATE CARBOXYLASE 3)	One of four genes encoding phosphoenolpyruvate carboxylase, its mRNA is most abundantly expressed in roots and siliques.	O.I.	C.G.	H.G.
34.0	99.7	306.7	At5g50200	835085	WR3 (WOUND-RESPONSIVE 3)	Wound-responsive gene 3 (WR3). Encodes a high-affinity nitrate transporter. Up-regulated by nitrate. Involved in jasmonic acid-independent wound signal transduction.	O.I.	C.G.	H.G.
33.7	99.7	75.6	At4g18340	827561	glycosyl hydrolase family 17 protein	F:cation binding, hydrolase activity, hydrolyzing O-glycosyl compounds, catalytic activity;P:carbohydrate metabolic process;C:endomembrane system;PFO	O.I.	C.G.	H.G.
33.6	99.7	382.9	At2g16060	816103	AHB1 (ARABIDOPSIS HEMOGLOBIN 1)	Encodes a class 1 nonsymbiotic hemoglobin induced by low oxygen levels with very high oxygen affinity. It is not likely to be a hemoglobin transporter because of its extremely high affinity for oxygen.	O.I.	C.G.	H.G.
33.6	99.7	359.0	At5g13420	831183	transaldolase, putative	F:catalytic activity, transaldolase activity;P:response to cadmium ion;C:mitochondrion, chloroplast stroma, chloroplast;BOPMAF	O.I.	C.G.	H.G.
33.6	99.7	37.3	At3g27070	822325	TOM20-1 (translocase outer membrane 20-1)	Form of TOM20, which is a component of the TOM complex, involved in transport of nuclear-encoded mitochondrial proteins	O.I.	C.G.	H.G.
32.8	99.7	48.8	At4g13290	826959	CYP71A19	putative cytochrome P450	O.I.	C.G.	H.G.
32.5	99.7	244.2	At4g39675	830122	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
32.5	99.7	159.6	At2g18980	816415	peroxidase, putative	F:electron carrier activity, peroxidase activity, heme binding;P:response to oxidative stress;C:endomembrane system;PFOBM	O.I.	C.G.	H.G.
32.5	99.7	69.5	At5g10040	830868	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
32.5	99.7	46.7	At5g10210	830885	-	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
32.0	99.7	64.9	At5g45440	834580	disease resistance protein-related	F:ATP binding;P:apoptosis;C:cellular_component unknown;PFB	O.I.	C.G.	H.G.
31.9	99.7	354.3	At2g26400	817180	ATARD3 (ACIREDUCTONE DIOXYGENASE 3)	Encodes a protein predicted to belong to the acireductone dioxygenase (ARD/ARD�)family.	O.I.	C.G.	H.G.
31.8	99.7	95.8	At5g56080	835707	NAS2 (NICOTIANAMINE SYNTHASE 2)	Encodes a protein with nicotianamine synthase activity. Its transcript levels rise in roots in response to zinc deficiency and rise in leaves in response to elevated levels of zinc.	O.I.	C.G.	H.G.
31.8	99.7	48.5	At2g35380	818105	peroxidase 20 (PER20) (P20)	F:electron carrier activity, peroxidase activity, heme binding;P:response to oxidative stress;C:endomembrane system;PFOB	O.I.	C.G.	H.G.
31.1	99.7	74.4	At3g18560	821387	unknown protein	F:unknown;P:unknown;C:unknown;P	O.I.	C.G.	H.G.
31.0	99.7	61.4	At3g50350	824197	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:chloroplast;P	O.I.	C.G.	H.G.
30.3	99.7	251.9	At3g03270	821303	universal stress protein (USP) family protein / early nodulin ENOD18 family protein	F:unknown;P:response to stress;C:plasma membrane, membrane;PFMBO	O.I.	C.G.	H.G.
30.0	99.7	44.2	At4g35150	829667	O-methyltransferase family 2 protein	F:methyltransferase activity, O-methyltransferase activity, protein dimerization activity;P:unknown;C:cytosol;PBFMO	O.I.	C.G.	H.G.
29.9	99.7	707.1	At1g77120	844047	ADH1 (ALCOHOL DEHYDROGENASE 1)	Catalyzes the reduction of acetaldehyde using NADH as reductant. Requires zinc for activity. Dimer. Anaerobic response polypeptide (ANP). Fermentation. The protein undergoes thiolation following treatment with the oxidant tert-butylhydroperoxide.	O.I.	C.G.	H.G.
29.4	99.7	172.6	At4g10270	826619	wound-responsive family protein	F:molecular_function unknown;P:response to wounding;C:unknown;P	O.I.	C.G.	H.G.
28.9	99.7	62.9	At4g33560	829495	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:unknown;P	O.I.	C.G.	H.G.
28.1	99.7	69.9	At3g02885	821194	GASA5 (GAST1 PROTEIN HOMOLOG 5)	F:unknown;P:response to gibberellin stimulus;C:endomembrane system;P	O.I.	C.G.	H.G.
28.0	99.7	29.1	At1g44050	841006	DC1 domain-containing protein	F:unknown;P:intracellular signaling cascade;C:cellular_component unknown;PMO	O.I.	C.G.	H.G.
27.3	99.7	437.6	At5g64100	836531	peroxidase, putative	F:electron carrier activity, peroxidase activity, heme binding;P:response to oxidative stress;C:cell wall;PFO	O.I.	C.G.	H.G.
27.3	99.7	95.8	At2g19590	816478	ACO1 (ACC OXIDASE 1)	encodes a protein whose sequence is similar to 1-aminocyclopropane-1-carboxylate oxidase	O.I.	C.G.	H.G.
27.3	99.7	84.8	At5g38930	833885	germin-like protein, putative	F:manganese ion binding, nutrient reservoir activity;P:biological_process unknown;C:cell wall;PFO	O.I.	C.G.	H.G.
27.1	99.7	38.0	At3g04530	819609	PPCK2	Encodes a second Arabidopsis phosphoenolpyruvate carboxylase kinase gene product with a different expression pattern from PPCK1. Expression of the gene is upregulated by exposure of the plant to light.	O.I.	C.G.	H.G.
27.0	99.7	28.0	At4g32950	829432	protein phosphatase 2C, putative / PP2C, putative	F:protein serine/threonine phosphatase activity, catalytic activity;P:biological_process unknown;C:cellular_component unknown;PMOFBV	O.I.	C.G.	H.G.
26.9	99.7	100.6	At4g10500	826642	oxidoreductase, 2OG-Fe(II) oxygenase family protein	F:oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, 2-oxoglutarate as one donor, and incorporation of one atom each of oxygen into both donors, oxidoreductase activity;P:secondary metabolic process;C:unknown;POBFM	O.I.	C.G.	H.G.
26.7	99.7	28.1	At3g58190	824988	LBD29 (LATERAL ORGAN BOUNDARIES-DOMAIN 29)	This gene contains two auxin-responsive element (AuxRE).	O.I.	C.G.	H.G.
26.4	99.7	20.1	At1g20700	838660	WOX14 (WUSCHEL RELATED HOMEOBOX 14)	Encodes a WUSCHEL-related homeobox gene family member with 65 amino acids in its homeodomain. Proteins in this family contain a sequence of eight residues (TLPLFPMH) downstream of the homeodomain called the WUS box. Functions in the shoot meristem organizing center to maintain the stem cells in an undifferentiated state.	O.I.	C.G.	H.G.
26.3	99.7	191.2	At3g02910	821189	-	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;MPBOA	O.I.	C.G.	H.G.
26.0	99.7	242.1	At5g41670	834169	6-phosphogluconate dehydrogenase family protein	F:in 6 functions;P:response to fructose stimulus, response to cadmium ion, response to sucrose stimulus, response to glucose stimulus;C:mitochondrion, chloroplast;BOMPFAV	O.I.	C.G.	H.G.
25.8	99.7	32.3	At5g22890	832353	zinc finger (C2H2 type) family protein	F:transcription factor activity;P:response to chitin, regulation of transcription;C:intracellular;MOPF	O.I.	C.G.	H.G.
25.6	99.7	97.2	At5g65640	836690	bHLH093 (beta HLH protein 93)	F:transcription factor activity, DNA binding;P:regulation of transcription;C:nucleus;PMFO	O.I.	C.G.	H.G.
25.6	99.7	71.2	At5g11920	831065	AtcwINV6 (6-&1-fructan exohydrolase)	Encodes a protein with fructan exohydrolase (FEH) activity acting on both inulin and levan-type fructans (1- and 6-FEH). The enzyme does not have invertase activity.	O.I.	C.G.	H.G.
25.6	99.7	53.4	At2g47520	819365	AP2 domain-containing transcription factor, putative	encodes a member of the ERF (ethylene response factor) subfamily B-2 of ERF/AP2 transcription factor family. The protein contains one AP2 domain. There are 5 members in this subfamily including RAP2.2 AND RAP2.12.	O.I.	C.G.	H.G.
24.9	99.6	349.9	At2g38380	818419	peroxidase 22 (PER22) (P22) (PRXEA) / basic peroxidase E	F:electron carrier activity, peroxidase activity, heme binding;P:response to salt stress;C:plant-type cell wall;PFO	O.I.	C.G.	H.G.
24.7	99.6	79.5	At1g22885	838895	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:endomembrane system;P	O.I.	C.G.	H.G.
24.4	99.6	83.9	At1g29020	839776	calcium-binding EF hand family protein	F:calcium ion binding;P:unknown;C:endomembrane system;PMOAF	O.I.	C.G.	H.G.
24.4	99.6	31.8	At5g19970	832119	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
23.9	99.6	113.8	At3g13650	820569	disease resistance response	F:molecular_function unknown;P:lignan biosynthetic process, defense response;C:endomembrane system;P	O.I.	C.G.	H.G.
23.8	99.6	21.8	At3g18400	821369	anac058 (Arabidopsis NAC domain containing protein 58)	F:transcription factor activity;P:multicellular organismal development, regulation of transcription;C:cellular_component unknown;PO	O.I.	C.G.	H.G.
23.6	99.6	77.7	At2g17850	816295	-	F:molecular_function unknown;P:aging;C:endomembrane system;BOPAMF	O.I.	C.G.	H.G.
23.5	99.6	67.2	At3g27170	822336	CLC-B (CHLORIDE CHANNEL B)	member of Anion channel protein family	O.I.	C.G.	H.G.
22.6	99.6	62.0	At5g45480	834584	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:plasma membrane;P	O.I.	C.G.	H.G.
22.4	99.6	75.6	At5g44920	834522	Toll-Interleukin-Resistance (TIR) domain-containing protein	F:transmembrane receptor activity;P:signal transduction, defense response, innate immune response;C:endoplasmic reticulum;PBO	O.I.	C.G.	H.G.
22.2	99.6	19.1	At2g39370	818522	unknown protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;PBMO	O.I.	C.G.	H.G.
21.5	99.6	92.8	At4g00080	828192	UNE11 (unfertilized embryo sac 11)	F:enzyme inhibitor activity, pectinesterase inhibitor activity, pectinesterase activity;P:double fertilization forming a zygote and endosperm;C:endomembrane system;P	O.I.	C.G.	H.G.
21.5	99.6	70.6	At4g31910	829321	transferase family protein	F:transferase activity, transferring acyl groups other than amino-acyl groups, transferase activity;P:biological_process unknown;C:nucleus;PFBO	O.I.	C.G.	H.G.
21.3	99.6	73.4	At3g03670	821193	peroxidase, putative	F:electron carrier activity, peroxidase activity, heme binding;P:response to oxidative stress;C:plant-type cell wall;PFOB	O.I.	C.G.	H.G.
21.3	99.6	23.0	At5g45460	834582	unknown protein	F:unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
21.0	99.6	317.6	At4g15390	827205	transferase family protein	F:transferase activity, transferring acyl groups other than amino-acyl groups, transferase activity;P:biological_process unknown;C:cellular_component unknown;PFO	O.I.	C.G.	H.G.
21.0	99.6	250.2	At5g20830	832206	SUS1 (SUCROSE SYNTHASE 1)	Encodes a protein with sucrose synthase activity (SUS1).	O.I.	C.G.	H.G.
21.0	99.6	73.5	At3g06390	819813	integral membrane family protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;P	O.I.	C.G.	H.G.
20.5	99.6	383.2	At1g11580	837701	PMEPCRA (METHYLESTERASE PCR A)	F:enzyme inhibitor activity, pectinesterase activity;P:cell wall modification;C:cell wall, plasma membrane, plant-type cell wall;PBFMO	O.I.	C.G.	H.G.
19.7	99.6	22.1	At3g11370	820309	DC1 domain-containing protein	F:unknown;P:unknown;C:cellular_component unknown;PFOM	O.I.	C.G.	H.G.
19.5	99.6	54.4	At4g37430	829897	CYP91A2 (CYTOCHROME P450 MONOOXYGENASE 91A2)	Encodes a member of the CYP81F cytochrome P450 monooxygenase subfamily.	O.I.	C.G.	H.G.
19.4	99.6	21.3	At4g25090	828612	respiratory burst oxidase, putative / NADPH oxidase, putative	F:in 7 functions;P:oxidation reduction;C:cytosolic ribosome, vacuole;MFPBOA	O.I.	C.G.	H.G.
19.3	99.6	16.6	At4g27850	828898	proline-rich family protein	F:molecular_function unknown;P:biological_process unknown;C:cellular_component unknown;MBOFPVA	O.I.	C.G.	H.G.

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GSM ID	GSM218595
Assay name	Whole roots 3.5hr KNO3 treated then frozen, biological rep2
GSE experiment	GSE7631: Cell-specific nitrogen responses in the Arabidopsis root

Microarray experiments to specifically-expressed genes

GSM ID GSM218595 Assay name Whole roots 3.5hr KNO3 treated then frozen, biological rep2 GSE experiment GSE7631: Cell-specific nitrogen responses in the Arabidopsis root

GSM ID GSM218595

Assay name Whole roots 3.5hr KNO3 treated then frozen, biological rep2

GSE experiment GSE7631: Cell-specific nitrogen responses in the Arabidopsis root