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| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [B] Rhizobium leguminosarum bv. viciae (strain 3841) | RHIL33 |  Q1MNF4 | 195841 | (9) |
| [B] Rhizobium meliloti | RHIME3 |  AROE_RHIME | 195819 | (29) |
| [B] Sinorhizobium medicae (strain WSM419) | SINMW3151 | AROE_SINMW | 195819 | (29) |