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| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [B] Beijerinckia indica subsp. indica (strain ATCC 9039 / DSM 1715 / NCIB 8712) | BEII91356 |  B2IK88 | 183863 | (67) |
| [B] Herminiimonas arsenicoxydans | HERAR610 | A4G2W7 | 183863 | (67) |
| [B] Azoarcus sp. (strain BH72) | AZOSB3904 | A1KCH6 | 183863 | (67) |
| [B] Delftia acidovorans (strain DSM 14801 / SPH-1) | DELAS869 | A9BQA6 | 183863 | (67) |
| [B] Verminephrobacter eiseniae (strain EF01-2) | VEREI2654 | A1WLG6 | 183863 | (67) |
| [B] Acidovorax sp. (strain JS42) | ACISJ3784 | A1WD27 | 183863 | (67) |
| [B] Diaphorobacter sp. (strain TPSY) | DIAST3312 | B9MHW1 | 183863 | (67) |
| [B] Methylibium petroleiphilum (strain PM1) | METPP73 | A2SBU6 | 183863 | (67) |
| [B] Rhodoferax ferrireducens (strain DSM 15236 / ATCC BAA-621 / T118) | RHOFD3865 | Q21RF8 | 183863 | (67) |
| [B] Methylobacterium sp. (strain 4-46) | METS44726 | B0UGB2 | 183863 | (67) |
| [B] Methylobacterium nodulans (strain ORS2060 / LMG 21967) | METNO5014 | B8ILI3 | 183863 | (67) |
| [B] Acidiphilium cryptum (strain JF-5) | ACICJ1751 | A5FZG0 | 183863 | (67) |
| [B] Methylobacterium extorquens (strain PA1) | METEP4407 | A9VWG3 | 183863 | (67) |
| [B] Methylobacterium populi (strain ATCC BAA-705 / NCIMB 13946 / BJ001) | METPB4854 | B1ZM18 | 183868 | (2) |
| [B] Methylobacterium chloromethanicum (strain CM4 / NCIMB 13688) | METC44716 | B7KSN6 | 183863 | (67) |
| [B] Rhodopseudomonas palustris | RHOPA2483 | Q6N6X3 | 183863 | (67) |
| [B] Rhodopseudomonas palustris (strain TIE-1) | RHOPT2714 | B3QHT2 | 183863 | (67) |
| [B] Rhodopseudomonas palustris (strain HaA2) | RHOP22960 | Q2IVT6 | 183863 | (67) |
| [B] Rhodopseudomonas palustris (strain BisA53) | RHOP52901 | Q07MF3 | 183863 | (67) |
| [B] Rhodopseudomonas palustris (strain BisB5) | RHOPS2473 | Q137M1 | 183863 | (67) |
| [B] Methylobacterium radiotolerans (strain ATCC 27329 / DSM 1819 / JCM 2831) | METRJ1154 | B1M202 | 183863 | (67) |