| Q2NHH7 | PURP_METST | Methanosphaera stadtmanae (strain ATCC 43021 / DSM 3091 / JCM 11832 / MCB-3) | purP Msp_0240 | Detail |
| A4FWE6 | PURP_METM5 | Methanococcus maripaludis (strain C5 / ATCC BAA-1333) | purP MmarC5_0205 | Detail |
| A9A9U0 | PURP_METM6 | Methanococcus maripaludis (strain C6 / ATCC BAA-1332) | purP MmarC6_1300 | Detail |
| A1RQP5 | PURP_PYRIL | Pyrobaculum islandicum (strain DSM 4184 / JCM 9189 / GEO3) | purP Pisl_0094 | Detail |
| Q8PT10 | PURP2_METMA | Methanosarcina mazei (strain ATCC BAA-159 / DSM 3647 / Goe1 / Go1 / JCM 11833 / OCM 88) (Methanosarcina frisia) | purP2 MM_2913 | Detail |
| A6VGV9 | PURP_METM7 | Methanococcus maripaludis (strain C7 / ATCC BAA-1331) | purP MmarC7_0618 | Detail |
| P14027 | PURP_METVS | Methanococcus vannielii (strain ATCC 35089 / DSM 1224 / JCM 13029 / OCM 148 / SB) | purP Mevan_0683 | Detail |
| Q9V0I8 | PURP_PYRAB | Pyrococcus abyssi (strain GE5 / Orsay) | purP PYRAB08010 PAB0547 | Detail |
| A4WN42 | PURP_PYRAR | Pyrobaculum arsenaticum (strain DSM 13514 / JCM 11321) | purP Pars_2265 | Detail |
| Q4JAU3 | PURP_SULAC | Sulfolobus acidocaldarius (strain ATCC 33909 / DSM 639 / JCM 8929 / NBRC 15157 / NCIMB 11770) | purP Saci_0707 | Detail |