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.

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)

Wright et al. Genome Biology 2001 2:preprint0001.1   doi:10.1186/gb-2001-2-3-preprint0001