| P73660 | HEM3_SYNY3 | Synechocystis sp. (strain PCC 6803 / Kazusa) | hemC slr1887 | Detail |
| B3CUP9 | HEM3_ORITI | Orientia tsutsugamushi (strain Ikeda) (Rickettsia tsutsugamushi) | hemC OTT_1638 | Detail |
| P71242 | WCAK_ECOLI | Escherichia coli (strain K12) | wcaK b2045 JW2030 | Detail |
| C0SP99 | YCIB_BACSU | Bacillus subtilis (strain 168) | yciB BSU03350 | Detail |
| Q49808 | HEM3_MYCLE | Mycobacterium leprae (strain TN) | hemC ML2421 B2168_C1_179 B2168_C3_262 | Detail |
| A1U6R9 | SELU_MARHV | Marinobacter hydrocarbonoclasticus (strain ATCC 700491 / DSM 11845 / VT8) | selU Maqu_3619 | Detail |
| B6I0F4 | SELU_ECOSE | Escherichia coli (strain SE11) | selU ECSE_0529 | Detail |
| C4ZUV3 | SELU_ECOBW | Escherichia coli (strain K12 / MC4100 / BW2952) | selU BWG_0380 | Detail |
| O32163 | SUFU_BACSU | Bacillus subtilis (strain 168) | sufU iscU nifU yurV BSU32680 | Detail |
| Q46CH0 | HEM3_METBF | Methanosarcina barkeri (strain Fusaro / DSM 804) | hemC Mbar_A1465 | Detail |