| KEGG ID | KO | Definition |
| tbd:Tbd_0805 | K01903 | succinyl-CoA synthase, beta subunit |
| mfa:Mfla_1889 | K01903 | succinyl-CoA synthetase (ADP-forming) beta subunit |
| mmb:Mmol_0676 | K01903 | succinyl-CoA synthetase, beta subunit |
| meh:M301_0798 | K01903 | succinyl-CoA synthetase, beta subunit |
| mei:Msip34_0905 | K01903 | succinyl-CoA synthetase, beta subunit |
| mep:MPQ_0944 | K01903 | succinyl-CoA synthetase, beta subunit |
| mbac:BN1209_0609 | K01903 | succinyl-CoA synthetase, beta subunit |
| mbat:BN1208_0406 | K01903 | succinyl-CoA synthetase, beta subunit |
| meu:ACJ67_04670 | K01903 | succinyl-CoA synthetase subunit beta |
| sdr:SCD_n01849 | K01903 | succinyl-CoA synthetase subunit beta |
| sulf:CAP31_07570 | K01903 | succinate--CoA ligase subunit beta |