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| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [B] Bradyrhizobium sp. (strain BTAi1 / ATCC BAA-1182) | BRASB4137 |  A5EJY1 | 188359 | (105) |
| [B] Bradyrhizobium sp. (strain ORS278) | BRASO3830 | A4YV89 | 188359 | (105) |
| [B] Methylocella silvestris (strain BL2 / DSM 15510 / NCIMB 13906) | METSB86 | B8EL76 | 188359 | (105) |
| [B] Oligotropha carboxidovorans (strain ATCC 49405 / DSM 1227 / OM5) | OLICO2667 | B6JGD8 | 188359 | (105) |
| [B] Rhodopseudomonas palustris (strain BisB18) | RHOPB2684 | Q214B0 | 188359 | (105) |
| [B] Stenotrophomonas maltophilia (strain K279a) | STRMK3489 | B2FRP5 | 188359 | (105) |
| [B] Stenotrophomonas maltophilia (strain R551-3) | STRM53117 | B4ST44 | 188360 | (30) |
| [B] Burkholderia multivorans (strain ATCC 17616 / 249) | BURM15073 | A9ANW2 | 188359 | (105) |
| [B] Nitrobacter hamburgensis (strain X14 / DSM 10229) | NITHX429 | Q1QR11 | 188359 | (105) |
| [B] Burkholderia phymatum (strain DSM 17167 / STM815) | BURP81155 | B2JHB5 | 188359 | (105) |
| [B] Geobacter lovleyi (strain ATCC BAA-1151 / DSM 17278 / SZ) | GEOLS2518 | B3E6E6 | 188359 | (105) |
| [B] Desulfatibacillum alkenivorans (strain AK-01) | DESAA2568 | B8FIR4 | n/a |