Table 1.
The data set size and breakdown on organisms
| Organism | Annotated protein sequences | Assigned as enzyme/non-enzyme | Assigned to enzyme class |
| Aeropyrum pernix | 2694 | 688 | 454 |
| Pyrobaculum aerophilum | 2605 | 863 | 570 |
| Sulfolobus solfataricus | 2977 | 1179 | 782 |
| Sulfolobus tokodaii | 2826 | 1041 | 716 |
| Archaeoglobus fulgidus | 2407 | 1053 | 696 |
| Methanobacterium thermoautotrophicum | 1869 | 878 | 584 |
| Methanococcus jannaschii | 1715 | 780 | 516 |
| Methanococcus mazei | 3371 | 1440 | 908 |
| Methanopyrus kandleri | 1691 | 658 | 455 |
| Methanosarcina acetivorans | 4540 | 1827 | 1123 |
| Pyrococcus abyssi | 1765 | 861 | 541 |
| Pyrococcus horikoshii | 2064 | 781 | 489 |
| Thermoplasma acidophilum | 1031 | 791 | 515 |
| Thermoplasma volcanium | 1499 | 778 | 523 |
| Total | 33,143 | 13,816 | 8872 |
Enzyme classes have been assigned based on sequence similarity to SWISS-PROT entries.