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| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [B] Rhodobacter sphaeroides (strain KD131 / KCTC 12085) | RHOSK3879 |  B9KUN7 | 77428 | (7) |
| [B] Rhodobacter sphaeroides (strain ATCC 17023 / 2.4.1 / NCIB 8253 / DSM 158) | RHOS43713 | Q3IW00 | n/a | |
| [B] Rhodobacter sphaeroides (strain ATCC 17029 / ATH 2.4.9) | RHOS13362 | A3PQ87 | 77428 | (7) |
| [B] Rhodococcus erythropolis (strain PR4 / NBRC 100887) | RHOE4801 | C0ZQ35 | 23638 | (4) |