| Role | Gene | Name | |
|---|
| 2H phosphoesterase superfamily protein Bsu1186 (yjcG) | No genes | | |
| 5-aminolevulinate synthase (EC 2.3.1.37) | No genes | | |
| Acyl-coenzyme A synthetases/AMP-(fatty) acid ligases, YtcI homolog | No genes | | |
| Coproporphyrinogen III oxidase, aerobic (EC 1.3.3.3) | SO0038 | hemF | |
| Coproporphyrinogen III oxidase, oxygen-independent (EC 1.3.99.22) | SO4730 | hemN | |
| Coproporphyrinogen III oxidase, oxygen-independent (EC 1.3.99.22), divergent, putative | No genes | | |
| Coproporphyrinogen III oxidase, oxygen-independent (EC 1.3.99.22), divergent, putative 2 | No genes | | |
| Cytochrome c-type biogenesis protein CcdA (DsbD analog) | No genes | | |
| Cytochrome c-type biogenesis protein CcsA/ResC | No genes | | |
| DUF1801 domain-containing protein | No genes | | |
| Ferrochelatase, protoheme ferro-lyase (EC 4.99.1.1) | SO2019 | hemH-1 | |
| | SO3348 | hemH-2 | |
| GNAT family acetyltransferase YjcF | No genes | | |
| Glutamate-1-semialdehyde aminotransferase (EC 5.4.3.8) | SO1300 | hemL | |
| Glutamyl-tRNA reductase (EC 1.2.1.70) | SO3834 | hemA | |
| HemX protein, negative effector of steady-state concentration of glutamyl-tRNA reductase | No genes | | |
| Homolog of E. coli HemY protein | No genes | | |
| Hypothetical membrane protein, possible involvement in cytochrome functioning/assembly | No genes | | |
| Hypothetical protein Q, similar to Chlorite dismutase | No genes | | |
| Hypothetical protein SAV1831 | No genes | | |
| Hypothetical protein SAV1869 | No genes | | |
| Hypothetical protein, ydbS homolog | No genes | | |
| Hypothetical protein, ydbT homolog | No genes | | |
| Hypothetical, related to broad specificity phosphatases COG0406 | No genes | | |
| Methyltransferase (EC 2.1.1.-) colocalized with Q | No genes | | |
| Periplasmic/membrane protein associated with DUF414 | SO4729 | | |
| Porphobilinogen deaminase (EC 2.5.1.61) | SO4313 | hemC | |
| Porphobilinogen synthase (EC 4.2.1.24) | SO2587 | hemB-1 | |
| | SO4208 | hemB-2 | |
| Possibly related to ydbT | No genes | | |
| Precorrin-2 oxidase (EC 1.3.1.76) | SO3108 | | |
| Protein of unknown function DUF414 | SO4728 | | |
| Protoporphyrinogen IX oxidase, aerobic (EC 1.3.3.4) | No genes | | |
| Protoporphyrinogen IX oxidase, oxygen-independent, HemG (EC 1.3.-.-) | SO0025 | | |
| | SO0027 | | |
| | SO3720 | | |
| Putative acetyl esterase YjcH (EC 3.1.1.-) | No genes | | |
| Putative lipoprotein SAV1865 | No genes | | |
| Putative membrane protein Q2 colocalized with Q | No genes | | |
| Putative nitroreductase family protein SACOL0874 | No genes | | |
| Putative oxidoreductase ferredoxin-type protein, clusters with CPO | No genes | | |
| Ribonuclease D (EC 3.1.26.3) | SO2580 | rnd | |
| Sirohydrochlorin cobaltochelatase (EC 4.99.1.3) | No genes | | |
| Sirohydrochlorin ferrochelatase (EC 4.99.1.4) | SO3108 | | |
| Small hypothetical protein Hyp1 | No genes | | |
| Sua5 YciO YrdC YwlC family protein | No genes | | |
| Uncharacterized SAV1743 homolog | No genes | | |
| Uncharacterized protein Q1 colocalized with Q | No genes | | |
| Uncharacterized protein UPF0344 | No genes | | |
| Uncharacterized protein, homolog of B.subtilis yhgC | No genes | | |
| Uroporphyrinogen III decarboxylase (EC 4.1.1.37) | SO0435 | hemE | |
| Uroporphyrinogen-III methyltransferase (EC 2.1.1.107) | SO3728 | cobA | |
| | SO4315 | hemX | |
| Uroporphyrinogen-III synthase (EC 4.2.1.75) | SO4314 | hemD | |
| Uroporphyrinogen-III synthase, divergent, Flavobacterial type (EC 4.2.1.75) | No genes | | |
| Uroporphyrinogen-III synthase, divergent, Francisella type (EC 4.2.1.75) | No genes | | |
| transmembrane protein, distant homology with ydbS | No genes | | |
| transmembrane protein, distant homology with ydbT | No genes | | |