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|
| Species | OMA ID | Cross-ref | OMA Group | (size) |
| [B] Acidithiobacillus ferrooxidans (strain ATCC 53993) | ACIF51784 |  SYE2_ACIF5 | 1606 | (13) |
| [B] Acidithiobacillus ferrooxidans (strain ATCC 23270 / DSM 14882 / NCIB 8455) | ACIF22086 |  B7J5K9 | 1606 | (13) |
| [B] Methylococcus capsulatus | METCA485 | SYE1_METCA | 1606 | (13) |
| [B] Nitrosococcus oceani (strain ATCC 19707 / NCIMB 11848) | NITOC2127 | SYE2_NITOC | 1631 | (3) |