Table 4 |
|||
|
History of distribution of gene product types for E. coli K-12 |
|||
| Gene product type |
1993* |
1998† |
2001 |
|
|
|||
| Enzyme |
748‡ |
906 |
990 |
| Putative enzyme |
452 |
550 |
|
| Transporter |
221 |
257 |
310 |
| Putative transporter |
281 |
298 |
|
| Regulator |
164 |
204 |
213 |
| Putative regulator |
168 |
151 |
|
| Membrane |
37 |
47 |
|
| Putative membrane |
55 |
132 |
|
| Factor |
36 |
68 |
109 |
| Putative factor |
52 |
33 |
|
| Structure |
113§ |
83 |
90 |
| Putative structure |
58 |
35 |
|
| Carrier |
17 |
35 |
|
| Putative carrier |
6 |
25 |
|
| Extrachromosomal origin |
56 |
282 |
|
| Putative extrachromosomal |
15 |
||
| Phenotype |
314 |
148 |
98 |
| RNA |
104 |
112 |
116 |
| Putative RNA |
4 |
||
| Leader |
12 |
12 |
|
| ORF |
1,413 |
886 |
|
| Total |
1,700 |
4,404 |
4,412¶ |
|
|
|||
|
*Adapted from Riley [24]. †Data from July 1998 record of GenProtEC. ‡Includes enzymes, leader peptides and enzyme activity. §Includes membrane components. ¶This number includes overlap situations where modules of a gene belong to different gene product type categories. The total number of genes is 4,401. |
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|
Serres et al. Genome Biology 2001 2:research0035.1 doi:10.1186/gb-2001-2-9-research0035 |
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