Summary of ABC-Type ATP-Binding Proteins Identified in the Seven Organisms
| Organism | Gram-negative bacteria | Gram-positive bacteria | Cyanobacteria | Archaea | |||
| Eco | Hin | Hpy | Mge | Mpn | Syn | Mja | |
| Total no. of proteins (A) | 4289 | 1717 | 1566 | 467 | 677 | 3166 | 1680 |
| no. of ATP-binding proteins (B) | 78 | 41 | 18 | 16 | 17 | 54 | 17 |
| percentage of (B)/(A) | 1.8 | 2.4 | 1.1 | 3.4 | 2.5 | 1.7 | 1.0 |
| No. of basal clusters | 9 | 8 | 2 | 5 | 4 | 13 | 3 |
| no. of ATP-binding proteins in basal clusters | 51 | 30 | 5 | 10 | 9 | 39 | 6 |
| no. of remaining ATPbinding proteins | 27 | 11 | 13 | 6 | 8 | 15 | 11 |
| No. of conserved operons | 61 | 30 | 10 | 9 | 9 | 18 | 14 |
| no. of ATP-binding proteins in conserved operons | 72 | 32 | 11 | 13 | 13 | 21 | 14 |
| no. of orphan ATPbinding proteins excluding groups 6 and 8 | 0 | 0 | 3 | 2 | 4 | 21 | 2 |
[i] (Eco) Escherichia coli; (Hin) Haemophilus influenzae; (Hpy) Helicobacter pylori; (Mge)Mycoplasma genitalium; (Mpn) Mycoplasma pneumoniae; (Syn) Synechocystis sp.; (Mja)Methanococcus jannaschii.