| Genomes | No. of intergenic regions |
No. of predicted attenuators |
| Archaea | ||
| Archaeoglobus fulgidus | 1684 | 11 |
| Methanococcus jannashii | 1515 | 45 |
| Pyrococcus abyssi | 1376 | 12 |
| Eubacteria | ||
| Chlamydiales | ||
| Chlamydia pneumoniae | 924 | 30 |
| Cyanobacteria | ||
| Synechocystis sp. | 2957 | 113 |
| Gram-positive | ||
| Bacillus halodurans | 3527 | 208 |
| Bacillus subtilis | 3650 | 203 |
| Clostridium acetobutylicum | 3386 | 275 |
| Lactococcus lactis | 1946 | 193 |
| Listeria innocua | 2565 | 154 |
| Mycobacterium tuberculosis | 3117 | 5 |
| Mycoplasma genitalium | 354 | 9 |
| Staphylococcus aureus Mu50 | 2338 | 180 |
| Streptococcus pneumoniae | 1680 | 147 |
| Proteobacteria (beta subdivision) | ||
| Neisseria meningitidis MC58 | 1868 | 118 |
| Proteobacteria (gamma subdivision) | ||
| Buchnera sp. | 550 | 18 |
| Escherichia coli K-12 | 3613 | 146 |
| Haemophilus influenzae | 1482 | 107 |
| Pseudomonas aeruginosa | 4756 | 78 |
| Vibrio cholerae chromosome 1 | 2203 | 115 |
| Xylella fastidiosa | 2116 | 29 |
| Proteobacteria (epsilon subdivision) | ||
| Campylobacter jejuni | 1028 | 28 |
| Helicobacter pylori J99 | 1150 | 29 |
| Spirochaetales | ||
| Borrelia burgdorferi | 638 | 14 |
| Thermas/Deinococcus | ||
| Deinococcus radiodurans chromosome 1 | 2055 | 35 |
| Thermotogales | ||
| Thermotoga maritima | 1173 | 23 |