Statistics for the Preservation of Three Categories of Contiguous Pairs of E. coli Genes Separated by between 1 and 500 Non-Coding Bases
| Number of gene pairs: | eco | stm | kpn | ype | vch |
| tandem (same strand) | 2388 | 1045 | 729 | 547 | 252 |
| divergently transcribed | 552 | 305 | 204 | 123 | 34 |
| convergently transcribed | 517 | 222 | 53 | 36 | 7 |
[i] The genes matched are further restricted to those in the third row of Table 1, with a unique match which begins within the first (last) six residues of the query gene (with first/last chosen so that the inter gene region is well delineated).