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| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [B] Opitutus terrae (strain DSM 11246 / PB90-1) | OPITP1557 |  B1ZTR9 | 208704 | (14) |
| [B] Methylobacterium radiotolerans (strain ATCC 27329 / DSM 1819 / JCM 2831) | METRJ5283 | B1LYF2 | 208701 | (17) |
| [B] Magnetospirillum magneticum (strain AMB-1 / ATCC 700264) | MAGMM1425 |  BAE50243.1 | 208704 | (14) |