| P42983 | NUCB_BACSU | Bacillus subtilis (strain 168) | nucB BSU25750 | Detail |
| A6UV34 | PURO_META3 | Methanococcus aeolicus (strain ATCC BAA-1280 / DSM 17508 / OCM 812 / Nankai-3) | purO Maeo_0773 | Detail |
| Q6LXN9 | PURO_METMP | Methanococcus maripaludis (strain S2 / LL) | purO MMP1310 | Detail |
| Q8TZ52 | PURO_METKA | Methanopyrus kandleri (strain AV19 / DSM 6324 / JCM 9639 / NBRC 100938) | purO MK0087 | Detail |
| Q2NEI3 | PURO_METST | Methanosphaera stadtmanae (strain ATCC 43021 / DSM 3091 / JCM 11832 / MCB-3) | purO Msp_1398 | Detail |
| A0B9N7 | PURO_METTP | Methanothrix thermoacetophila (strain DSM 6194 / JCM 14653 / NBRC 101360 / PT) (Methanosaeta thermophila) | purO Mthe_1644 | Detail |
| O27099 | PURO_METTH | Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H) (Methanobacterium thermoautotrophicum) | purO MTH_1020 | Detail |
| H8EZH5 | RPFB_MYCTE | Mycobacterium tuberculosis (strain ATCC 35801 / TMC 107 / Erdman) | rpfB ERDMAN_1122 | Detail |
| Q58043 | PURO_METJA | Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440) (Methanococcus jannaschii) | purO MJ0626 | Detail |
| Q5UZ65 | PURO_HALMA | Haloarcula marismortui (strain ATCC 43049 / DSM 3752 / JCM 8966 / VKM B-1809) (Halobacterium marismortui) | purO rrnAC2659 | Detail |