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Table 2 Ontological classification of 22,339 human gene products. Each transcriptional unit and HINT transcript (in parentheses) was assigned to a unique biological function or process.

From: A draft annotation and overview of the human genome

Biological function

Number of transcripts

Biological process

Number of transcripts

Transcription factor

958 (306)

Carbohydrate metabolism

281 (84)

Translation factor

62 (27)

Nucleotide and nucleic acid metabolism

173 (51)

RNA binding

142 (41)

DNA replication

240 (126)

Ribosomal protein

232 (130)

Transcription

1,059 (651)

Cell cycle regulator

42 (16)

RNA processing

204 (59)

Structural protein

145 (48)

Amino Acid and derivative metabolism

87 (29)

Cytoskeleton structural protein

329 (181)

Protein biosynthesis

264 (162)

Extracellular matrix

361 (87)

Protein modification

235 (88)

Actin binding

66 (25)

Protein targeting

26 (5)

Motor protein

245 (77)

Protein degradation

136 (45)

Chaperone

87 (27)

Proteolysis and peptidolysis

96 (36)

Enzyme

2,664 (1,404)

Lipid metabolism

424 (187)

Protein kinase

895 (484)

Monocarbon compound metabolism

9 (3)

Protein kinase inhibitor

19 (12)

Coenzyme and prosthetic group metabolism

92 (29)

Protein phsophatase

43 (7)

Steroid compound metabolism

40 (10)

Protein phsophatase inhibitor

17 (3)

Prostaglandin metabolism

12 (3)

Protease

441 (255)

Transport

549 (288)

Protease inhibitor

92 (37)

Electron transport

491 (273)

Enzyme activator

18 (3)

Ion transport

302 (90)

Enzyme inhibitor

14 (4)

Small molecular transport

19 (9)

Alkyl transfer

17 (3)

Neurotransmitter transport

9 (3)

Amide transfer

15 (3)

Ion homeostasis

201 (57)

Carbonyl transfer

191 (38)

Organelle organization and biogenesis

408 (254)

Hydroxyl transfer

13 (6)

Nuclear organization and biogenesis

1,380 (647)

Phosphoryl transfer

823 (281)

Cytoplasm organization and biogenesis

42 (20)

Oxireduction

148 (76)

Meiosis

15 (2)

Transmembrane protein

184 (48)

Mitosis

25 (6)

Receptor

921 (478)

Cell cycle

271 (100)

G protein-linked receptor

164 (106)

DNA packaging

15 (6)

Defense/immunity protein

353 (164)

DNA repair

132 (41)

Ligand binding or carrier

691 (331)

DNA recombination

31 (3)

Ion channel

245 (141)

Methylation

185 (53)

Oncogene

128 (42)

Signal transduction

1,231 (383)

Tumor suppressor

8 (6)

Growth regulation

15 (4)

Growth factor

95 (40)

Differentiation

24 (6)

Hormone

42 (14)

Apoptosis

160 (49)

Cell communication

247 (84)

Angiogenesis

11 (4)

Cell adhesion

433 (252)

Defense/immunity

112 (49)

  

Detoxification

33 (15)

  

Stress response

90 (41)

  

Developmental process

278 (99)

  

Neurogenesis and regeneration

147 (43)

  

Physiological process

159 (43)

  

Sensory perception

292 (65)

Functionally classified

12,334 (5,204)

Process classified

10,005 (4,225)