| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Shewanella loihica PV-4 | Shew_2692 | | cytochrome B561 (RefSeq) | insig. | 100 | 100 |
| o | Shewanella oneidensis MR-1 | SO2726 | | cytochrome b, putative (NCBI ptt file) | insig. | 56 | 93 |
| o | Shewanella sp. ANA-3 | Shewana3_2510 | | cytochrome B561 (RefSeq) | insig. | 58 | 92 |
| | Shewanella amazonensis SB2B | Sama_2494 | | cytochrome b561 (RefSeq) | insig. | 31 | 87 |
| | Shewanella sp. ANA-3 | Shewana3_0245 | | cytochrome B561 (RefSeq) | insig. | 29 | 89 |
| | Shewanella oneidensis MR-1 | SO4483 | | cytochrome b, putative (NCBI ptt file) | insig. | 26 | 92 |
| | Rhodospirillum rubrum S1H | Rru_A1243 | | Cytochrome B561 (NCBI) | insig. | 29 | 85 |
| | Alteromonas macleodii MIT1002 | MIT1002_01464 | | Ni/Fe-hydrogenase, b-type cytochrome subunit | insig. | 26 | 85 |
| | Caulobacter crescentus NA1000 | CCNA_03017 | | hydrogenase, cytochrome b-type subunit | insig. | 29 | 85 |
| | Caulobacter crescentus NA1000 Δfur | CCNA_03017 | | hydrogenase, cytochrome b-type subunit | cofit | 29 | 85 |
| | Shewanella loihica PV-4 | Shew_3204 | | cytochrome B561 (RefSeq) | insig. | 26 | 88 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS13120 | | cytochrome B oxidoreductase | sig. | 30 | 88 |
| | Variovorax sp. OAS795 | ABID97_RS13670 | | Ni/Fe-hydrogenase, b-type cytochrome subunit | insig. | 25 | 93 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_2188 | | Ni,Fe-hydrogenase I cytochrome b subunit | sig. | 30 | 54 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS04230 | | cytochrome B oxidoreductase | cofit | 29 | 85 |
| | Ralstonia solanacearum UW163 | UW163_RS09440 | | cytochrome B oxidoreductase | no data | 29 | 85 |
| | Ralstonia solanacearum GMI1000 | RS_RS11820 | | cytochrome B oxidoreductase | insig. | 28 | 88 |
| | Sphingobium sp. HT1-2 | GFF2800 | | Cytochrome b | insig. | 29 | 86 |
| | Dyella japonica UNC79MFTsu3.2 | ABZR86_RS04290 | | cytochrome b/b6 domain-containing protein | insig. | 24 | 85 |
| | Azospirillum sp. SherDot2 | MPMX19_02395 | | hypothetical protein | insig. | 31 | 86 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF2921 | | Cytochrome b | insig. | 25 | 89 |
| | Shewanella loihica PV-4 | Shew_1074 | | cytochrome B561 (RefSeq) | sig. | 30 | 59 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS03850 | | cytochrome b561 | insig. | 26 | 89 |
| | Variovorax sp. OAS795 | ABID97_RS10790 | | cytochrome b/b6 domain-containing protein | insig. | 24 | 87 |
| | Shewanella sp. ANA-3 | Shewana3_1134 | | cytochrome B561 (RefSeq) | insig. | 34 | 54 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF2227 | | Ni,Fe-hydrogenase I cytochrome b subunit | insig. | 25 | 93 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_27290 | | cytochrome B | insig. | 30 | 52 |
| | Rhodospirillum rubrum S1H | Rru_A1163 | | Nickel-dependent hydrogenase b-type cytochrome subunit (NCBI) | insig. | 25 | 89 |
| | Variovorax sp. SCN45 | GFF3647 | | Cytochrome b | insig. | 26 | 88 |
| | Pseudomonas stutzeri RCH2 | Psest_4239 | | Cytochrome b | sig. | 30 | 89 |
| | Rhodospirillum rubrum S1H | Rru_A3588 | | Cytochrome B561 (NCBI) | insig. | 30 | 51 |
| | Azospirillum brasilense Sp245 | AZOBR_RS12980 | | cytochrome B | no data | 25 | 92 |
| | Dechlorosoma suillum PS | Dsui_2247 | | cytochrome b | no data | 31 | 40 |
| | Pseudomonas syringae pv. syringae B728a | Psyr_3509 | | Cytochrome B561, bacterial | insig. | 22 | 89 |
| | Pseudomonas syringae pv. syringae B728a ΔmexB | Psyr_3509 | | Cytochrome B561, bacterial | insig. | 22 | 89 |
| | Dechlorosoma suillum PS | Dsui_3327 | | cytochrome b | strong | 30 | 87 |
| | Shewanella oneidensis MR-1 | SO3421 | | b-type cytochrome, putative (NCBI ptt file) | insig. | 28 | 51 |
| | Pseudomonas sp. BP01 | JOY50_RS15635 | | cytochrome b/b6 domain-containing protein | insig. | 22 | 67 |
| | Rhodopseudomonas palustris CGA009 | TX73_004965 | | Ni/Fe-hydrogenase, b-type cytochrome subunit | insig. | 19 | 97 |
| | Pseudomonas fluorescens SBW25 | PFLU_RS25095 | | cytochrome b561 | insig. | 29 | 52 |
| | Pseudomonas fluorescens SBW25-INTG | PFLU_RS25095 | | cytochrome b561 | sig. | 29 | 52 |
| | Rhodanobacter denitrificans MT42 | LRK55_RS13860 | | cytochrome b/b6 domain-containing protein | insig. | 30 | 52 |
| | Rhodanobacter denitrificans FW104-10B01 | LRK54_RS14140 | | cytochrome b/b6 domain-containing protein | strong | 30 | 52 |
| | Rhodanobacter sp000427505 FW510-R12 | LRK53_RS14465 | | cytochrome b/b6 domain-containing protein | insig. | 24 | 85 |
| | Azospirillum sp. SherDot2 | MPMX19_05286 | | putative Ni/Fe-hydrogenase B-type cytochrome subunit | insig. | 21 | 90 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS35670 | | cytochrome B oxidoreductase | insig. | 24 | 88 |
| | Rhodopseudomonas palustris CGA009 | TX73_011970 | | cytochrome b/b6 domain-containing protein | insig. | 24 | 85 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF2523 | | Ni,Fe-hydrogenase I cytochrome b subunit | insig. | 23 | 85 |
| | Vibrio cholerae E7946 ATCC 55056 | CSW01_17755 | | cytochrome B | insig. | 26 | 52 |
| | Pseudomonas sp. S08-1 | OH686_07335 | | Cytochrome b | insig. | 28 | 53 |
| | Rhodanobacter sp. FW510-T8 | OKGIIK_00855 | | Cytochrome B | insig. | 27 | 52 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_2122 | | Ni,Fe-hydrogenase I cytochrome b subunit | insig. | 27 | 89 |
| | Pseudomonas sp. SVBP6 | COO64_RS10545 | | cytochrome b/b6 domain-containing protein | insig. | 29 | 52 |
| | Shewanella amazonensis SB2B | Sama_0900 | | b-type cytochrome, putative (RefSeq) | insig. | 29 | 41 |
| | Variovorax sp. OAS795 | ABID97_RS00595 | | cytochrome b/b6 domain-containing protein | insig. | 25 | 89 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF2789 | | Ni,Fe-hydrogenase I cytochrome b subunit | insig. | 21 | 96 |
| | Escherichia fergusonii Becca | EFB2_03097 | | putative Ni/Fe-hydrogenase 1 B-type cytochrome subunit | insig. | 23 | 67 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS05120 | | Ni/Fe-hydrogenase b-type cytochrome subunit | insig. | 23 | 67 |
| | Xanthobacter sp. DMC5 | GFF4442 | | putative Ni/Fe-hydrogenase B-type cytochrome subunit | insig. | 23 | 50 |
| | Methylophilus sp. DMC18 | GFF2104 | | hypothetical protein | insig. | 27 | 49 |
| | Methylophilus sp. DMC18 | GFF2541 | | hypothetical protein | insig. | 26 | 52 |
| | Escherichia coli BL21 | ECD_00977 | | hydrogenase 1, b-type cytochrome subunit | insig. | 24 | 52 |
| | Escherichia coli ECOR38 | HEPCGN_23370 | hyaC | Ni/Fe-hydrogenase b-type cytochrome subunit | insig. | 24 | 52 |
| | Escherichia coli ECRC100 | OKFHMN_04800 | hyaC | Ni/Fe-hydrogenase b-type cytochrome subunit | cofit | 24 | 52 |
| | Escherichia coli ECRC101 | MCAODC_24185 | hyaC | Ni/Fe-hydrogenase b-type cytochrome subunit | insig. | 24 | 52 |
| | Escherichia coli ECRC102 | NIAGMN_23050 | hyaC | Ni/Fe-hydrogenase b-type cytochrome subunit | insig. | 24 | 52 |
| | Escherichia coli ECRC62 | BNILDI_19870 | hyaC | Ni/Fe-hydrogenase b-type cytochrome subunit | insig. | 24 | 52 |
| | Escherichia coli ECRC98 | JDDGAC_08410 | hyaC | Ni/Fe-hydrogenase b-type cytochrome subunit | insig. | 24 | 52 |
| | Escherichia coli ECRC99 | KEDOAH_22945 | hyaC | Ni/Fe-hydrogenase b-type cytochrome subunit | no data | 24 | 52 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_02692 | | putative Ni/Fe-hydrogenase 1 B-type cytochrome subunit | insig. | 24 | 52 |
| | Escherichia coli BW25113 | b0974 | hyaC | hydrogenase 1, b-type cytochrome subunit (NCBI) | sig. | 24 | 52 |
| | Escherichia coli ECOR27 | NOLOHH_21705 | hyaC | Ni/Fe-hydrogenase b-type cytochrome subunit | insig. | 24 | 52 |
| | Mucilaginibacter yixingensis YX-36 DSM 26809 | ABZR88_RS13580 | | cytochrome b/b6 domain-containing protein | insig. | 39 | 22 |