| Organism | Ratio1 | Gene1 | Name1 | Description1 | Ratio2 | Gene2 | Name2 | Description2 | Cofit | Rank |
| Vibrio cholerae E7946 ATCC 55056 | 1.0 | CSW01_12815 | | RNA polymerase sigma-54 factor | 1.0 | CSW01_01065 | | TonB-dependent siderophore receptor | 0.49 | 15 |
| Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | 0.63 | GFF2946 | | RNA polymerase sigma-54 factor RpoN | 0.23 | GFF4258 | | Ferrichrome-iron receptor | low | > 78 |
| Klebsiella pneumoniae MKP103 | 0.63 | KDGMDA_06080 | | RNA polymerase factor sigma-54 | 0.23 | KDGMDA_13370 | | ferrichrome porin FhuA | low | > 95 |
| Escherichia coli HS(pFamp)R (ATCC 700891) | 0.63 | OHPLBJKB_00498 | | RNA polymerase sigma-54 factor | 0.23 | OHPLBJKB_03512 | | Ferrichrome outer membrane transporter/phage receptor | — | — |
| Escherichia coli ECRC98 | 0.63 | JDDGAC_21565 | rpoN | RNA polymerase factor sigma-54 | 0.24 | JDDGAC_13915 | fhuA | ferrichrome porin FhuA | — | — |
| Escherichia coli ECOR38 | 0.63 | HEPCGN_16815 | rpoN | RNA polymerase factor sigma-54 | 0.24 | HEPCGN_08270 | fhuA | ferrichrome porin FhuA | — | — |
| Escherichia coli Nissle 1917 | 0.63 | ECOLIN_RS18425 | | RNA polymerase factor sigma-54 | 0.24 | ECOLIN_RS00840 | | ferrichrome porin FhuA | — | — |
| Escherichia coli ECRC62 | 0.63 | BNILDI_01795 | rpoN | RNA polymerase factor sigma-54 | 0.23 | BNILDI_09005 | fhuA | ferrichrome porin FhuA | — | — |
| Escherichia coli ECRC102 | 0.63 | NIAGMN_15700 | rpoN | RNA polymerase factor sigma-54 | 0.24 | NIAGMN_08170 | fhuA | ferrichrome porin FhuA | — | — |
| Escherichia coli BL21 | 0.63 | ECD_03067 | | RNA polymerase, sigma 54 (sigma N) factor | 0.24 | ECD_00149 | | ferrichrome outer membrane transporter | low | > 61 |
| Rahnella sp. WP5 | 0.63 | EX31_RS12400 | | RNA polymerase factor sigma-54 | 0.23 | EX31_RS03225 | | ferrichrome porin FhuA | low | > 89 |
| Escherichia fergusonii Becca | 0.63 | EFB2_00621 | | RNA polymerase sigma-54 factor | 0.24 | EFB2_03894 | | Ferrichrome outer membrane transporter/phage receptor | — | — |
| Escherichia coli ECRC101 | 0.63 | MCAODC_08460 | rpoN | RNA polymerase factor sigma-54 | 0.24 | MCAODC_00835 | fhuA | ferrichrome porin FhuA | — | — |
| Alteromonas macleodii MIT1002 | 0.63 | MIT1002_00827 | | RNA polymerase sigma-54 factor 2 | 0.16 | MIT1002_01786 | | Ferric hydroxamate uptake | low | > 70 |
| Escherichia coli ECRC99 | 0.63 | KEDOAH_10210 | rpoN | RNA polymerase factor sigma-54 | 0.24 | KEDOAH_17835 | fhuA | ferrichrome porin FhuA | — | — |
| Escherichia coli ECRC100 | 0.63 | OKFHMN_17940 | rpoN | RNA polymerase factor sigma-54 | 0.24 | OKFHMN_10320 | fhuA | ferrichrome porin FhuA | — | — |
| Escherichia coli ECOR27 | 0.62 | NOLOHH_09740 | rpoN | RNA polymerase factor sigma-54 | 0.23 | NOLOHH_02665 | fhuA | ferrichrome porin FhuA | — | — |
| Escherichia coli BW25113 | 0.62 | b3202 | rpoN | DNA-directed RNA polymerase subunit N (NCBI) | 0.23 | b0150 | fhuA | ferrichrome outer membrane transporter (NCBI) | — | — |
| Enterobacter asburiae PDN3 | 0.62 | EX28DRAFT_3256 | | RNA polymerase, sigma 54 subunit, RpoN/SigL | 0.25 | EX28DRAFT_3739 | | TonB-dependent siderophore receptor | — | — |
| Klebsiella michiganensis M5al | 0.62 | BWI76_RS25265 | | RNA polymerase factor sigma-54 | 0.24 | BWI76_RS05630 | | TonB-dependent siderophore receptor | — | — |
| Pantoea sp. MT58 | 0.62 | IAI47_17185 | | RNA polymerase factor sigma-54 | 0.22 | IAI47_15610 | | ferrichrome porin FhuA | low | > 76 |
| Serratia liquefaciens MT49 | 0.62 | IAI46_22470 | | RNA polymerase factor sigma-54 | 0.27 | IAI46_21185 | | ferrichrome porin FhuA | — | — |
| Pectobacterium carotovorum WPP14 | 0.62 | HER17_RS20060 | | RNA polymerase factor sigma-54 | 0.36 | HER17_RS17620 | | TonB-dependent siderophore receptor | low | > 75 |
| Pantoea agglomerans CFBP13505 P0401 | 0.62 | PagCFBP13505_RS09350 | | RNA polymerase factor sigma-54 | 0.23 | PagCFBP13505_RS13395 | | ferrichrome porin FhuA | low | > 74 |
| Dickeya dianthicola 67-19 | 0.61 | HGI48_RS01445 | | RNA polymerase factor sigma-54 | 0.23 | HGI48_RS14640 | | TonB-dependent siderophore receptor | low | > 71 |
| Dickeya dianthicola ME23 | 0.61 | DZA65_RS01510 | | RNA polymerase factor sigma-54 | 0.23 | DZA65_RS15585 | | TonB-dependent siderophore receptor | low | > 75 |
| Dickeya dadantii 3937 | 0.61 | DDA3937_RS01530 | | RNA polymerase factor sigma-54 | 0.34 | DDA3937_RS03490 | | TonB-dependent siderophore receptor | low | > 74 |
| Erwinia amylovora T8 | 0.61 | OLJFJH_07070 | | RNA polymerase factor sigma-54 | 0.23 | OLJFJH_00705 | | ferrichrome porin FhuA | low | > 58 |
| Enterobacter sp. TBS_079 | 0.61 | MPMX20_04108 | | RNA polymerase sigma-54 factor | 0.24 | MPMX20_00608 | | Ferrichrome outer membrane transporter/phage receptor | — | — |
| Erwinia tracheiphila HP pepo 2.2 | 0.60 | IJEDHG_13740 | rpoN | RNA polymerase factor sigma-54 | 0.08 | IJEDHG_12650 | | TonB-dependent siderophore receptor | low | > 61 |
| Pseudomonas fluorescens FW300-N2E3 | 0.58 | AO353_05180 | | RNA polymerase sigma-54 factor | 0.13 | AO353_05095 | | TonB-dependent receptor | — | — |
| Pseudomonas fluorescens SBW25 | 0.58 | PFLU_RS04400 | | RNA polymerase factor sigma-54 | 0.26 | PFLU_RS30190 | | TonB-dependent siderophore receptor | — | — |
| Pseudomonas fluorescens SBW25-INTG | 0.58 | PFLU_RS04400 | | RNA polymerase factor sigma-54 | 0.26 | PFLU_RS30190 | | TonB-dependent siderophore receptor | — | — |
| Pseudomonas syringae pv. syringae B728a ΔmexB | 0.58 | Psyr_4147 | | RNA polymerase, sigma 54 subunit, RpoN/SigL | 0.14 | Psyr_2229 | | TonB-dependent siderophore receptor | — | — |
| Pseudomonas syringae pv. syringae B728a | 0.58 | Psyr_4147 | | RNA polymerase, sigma 54 subunit, RpoN/SigL | 0.14 | Psyr_2229 | | TonB-dependent siderophore receptor | — | — |
| Pseudomonas fluorescens FW300-N2C3 | 0.58 | AO356_07035 | | RNA polymerase sigma-54 factor | 0.28 | AO356_14070 | | TonB-dependent receptor | — | — |
| Pseudomonas simiae WCS417 | 0.58 | PS417_04345 | | RNA polymerase factor sigma-54 | 0.25 | PS417_28535 | | TonB-dependent receptor | — | — |
| Pseudomonas sp. DMC3 | 0.57 | GFF1828 | | RNA polymerase sigma-54 factor | 0.26 | GFF89 | | Ferrichrome outer membrane transporter/phage receptor | — | — |
| Shewanella oneidensis MR-1 | 0.57 | SO3961 | rpoN | RNA polymerase sigma-54 factor (NCBI ptt file) | 0.11 | SO1156 | | TonB-dependent receptor (NCBI ptt file) | low | > 76 |
| Shewanella sp. ANA-3 | 0.57 | Shewana3_0672 | | RNA polymerase factor sigma-54 (RefSeq) | 0.12 | Shewana3_0983 | | TonB-dependent siderophore receptor (RefSeq) | low | > 73 |
| Marinobacter adhaerens HP15 | 0.57 | HP15_2442 | | RNA polymerase, sigma 54 subunit, RpoN | 0.23 | HP15_3673 | | ferrichrome outer membrane transporter | low | > 73 |
| Pseudomonas aeruginosa PA14 | 0.57 | IKLFDK_01770 | | RNA polymerase factor sigma-54 | 0.26 | IKLFDK_23075 | | TonB-dependent ferrichrome receptor FiuA | — | — |
| Shewanella amazonensis SB2B | 0.57 | Sama_3088 | | RNA polymerase factor sigma-54 (RefSeq) | 0.21 | Sama_2875 | | outer membrane protein (RefSeq) | low | > 62 |
| Pseudomonas fluorescens GW456-L13 | 0.57 | PfGW456L13_5014 | | RNA polymerase sigma-54 factor RpoN | 0.26 | PfGW456L13_1133 | | Ferrichrome-iron receptor @ Ferric siderophore receptor, TonB dependent | — | — |
| Pseudomonas sp. BP01 | 0.57 | JOY50_RS11130 | | RNA polymerase factor sigma-54 | 0.24 | JOY50_RS17870 | | TonB-dependent siderophore receptor | — | — |
| Pseudomonas putida KT2440 | 0.57 | PP_0952 | | RNA polymerase sigma-54 factor | 0.24 | PP_0350 | | Outer membrane ferrichrome-iron receptor | — | — |
| Pseudomonas fluorescens FW300-N1B4 | 0.57 | Pf1N1B4_1080 | | RNA polymerase sigma-54 factor RpoN | 0.27 | Pf1N1B4_2472 | | Ferrichrome-iron receptor @ Ferric siderophore receptor, TonB dependent | — | — |
| Pseudomonas sp. RS175 | 0.56 | PFR28_00173 | | RNA polymerase sigma-54 factor | 0.27 | PFR28_04116 | | Ferrichrome outer membrane transporter/phage receptor | — | — |
| Pseudomonas stutzeri RCH2 | 0.56 | Psest_3313 | | RNA polymerase sigma-54 factor | 0.23 | Psest_4337 | | TonB-dependent siderophore receptor | — | — |
| Pseudomonas segetis P6 | 0.56 | MPMX49_03858 | | RNA polymerase sigma-54 factor | 0.23 | MPMX49_02234 | | Ferrichrome outer membrane transporter/phage receptor | — | — |
| Pseudomonas fluorescens FW300-N2E2 | 0.56 | Pf6N2E2_3267 | | RNA polymerase sigma-54 factor RpoN | 0.27 | Pf6N2E2_4746 | | Ferrichrome-iron receptor @ Ferric siderophore receptor, TonB dependent | — | — |
| Pseudomonas lactucae CFBP13502 | 0.56 | GEMAOFIL_01075 | | RNA polymerase sigma-54 factor | 0.26 | GEMAOFIL_00177 | | Ferrichrome outer membrane transporter/phage receptor | — | — |
| Pseudomonas sp. SVBP6 | 0.56 | COO64_RS04285 | | RNA polymerase factor sigma-54 | 0.24 | COO64_RS22790 | | TonB-dependent siderophore receptor | — | — |
| Shewanella loihica PV-4 | 0.56 | Shew_3311 | | RNA polymerase factor sigma-54 (RefSeq) | 0.08 | Shew_3841 | | TonB-dependent siderophore receptor (RefSeq) | low | > 60 |
| Pseudomonas sp. S08-1 | 0.56 | OH686_08540 | | RNA polymerase sigma-54 factor | 0.30 | OH686_01055 | | Ferrichrome-iron receptor | — | — |
| Dechlorosoma suillum PS | 0.41 | Dsui_0704 | | RNA polymerase sigma-54 factor | 0.20 | Dsui_2950 | | TonB-dependent siderophore receptor | low | > 51 |
| Dyella japonica UNC79MFTsu3.2 | 0.40 | ABZR86_RS19815 | | RNA polymerase factor sigma-54 | 0.11 | ABZR86_RS09175 | | catecholate siderophore receptor Fiu | low | > 74 |
| Rhodanobacter denitrificans MT42 | 0.40 | LRK55_RS12575 | | RNA polymerase factor sigma-54 | 0.27 | LRK55_RS02500 | | TonB-dependent siderophore receptor | low | > 63 |
| Acinetobacter baumannii LAC-4 | 0.40 | RR41_RS15830 | | RNA polymerase factor sigma-54 | 0.17 | RR41_RS00890 | | TonB-dependent siderophore receptor | low | > 55 |
| Rhodanobacter denitrificans FW104-10B01 | 0.40 | LRK54_RS12875 | | RNA polymerase factor sigma-54 | 0.27 | LRK54_RS02745 | | TonB-dependent siderophore receptor | low | > 59 |
| Ralstonia solanacearum GMI1000 | 0.39 | RS_RS02020 | | RNA polymerase sigma-54 factor | 0.25 | RS_RS14625 | | TonB-dependent siderophore receptor | low | > 80 |
| Paraburkholderia bryophila 376MFSha3.1 | 0.39 | H281DRAFT_01927 | | RNA polymerase, sigma 54 subunit, RpoN/SigL | 0.24 | H281DRAFT_04924 | | iron complex outermembrane recepter protein | low | > 103 |
| Ralstonia sp. UNC404CL21Col | 0.39 | ABZR87_RS07060 | | RNA polymerase factor sigma-54 | 0.23 | ABZR87_RS12840 | | TonB-dependent siderophore receptor | low | > 80 |
| Paraburkholderia sabiae LMG 24235 | 0.39 | QEN71_RS01755 | | RNA polymerase factor sigma-54 | 0.23 | QEN71_RS30735 | | TonB-dependent siderophore receptor | low | > 153 |
| Paraburkholderia graminis OAS925 | 0.39 | ABIE53_000718 | | RNA polymerase sigma-54 factor | 0.24 | ABIE53_001694 | | iron complex outermembrane receptor protein | low | > 113 |
| Burkholderia phytofirmans PsJN | 0.39 | BPHYT_RS02905 | | RNA polymerase subunit sigma-54 | 0.23 | BPHYT_RS20275 | | TonB-denpendent receptor | low | > 109 |
| Xanthomonas campestris pv. campestris strain 8004 | 0.39 | Xcc-8004.1662.1 | | RNA polymerase sigma-54 factor RpoN | 0.11 | Xcc-8004.719.1 | | Ferric-pseudobactin M114 receptor pbuA precursor | low | > 74 |
| Ralstonia solanacearum UW163 | 0.39 | UW163_RS02410 | | RNA polymerase sigma-54 factor | 0.25 | UW163_RS06950 | | TonB-dependent siderophore receptor | — | — |
| Ralstonia solanacearum IBSBF1503 | 0.39 | RALBFv3_RS11170 | | RNA polymerase sigma-54 factor | 0.25 | RALBFv3_RS06675 | | TonB-dependent siderophore receptor | low | > 76 |
| Cupriavidus basilensis FW507-4G11 | 0.39 | RR42_RS02085 | | RNA polymerase subunit sigma-54 | 0.16 | RR42_RS31760 | | IclR family transcriptional regulator | low | > 128 |
| Ralstonia solanacearum PSI07 | 0.39 | RPSI07_RS22130 | | RNA polymerase factor sigma-54 | 0.25 | RPSI07_RS10550 | | TonB-dependent siderophore receptor | low | > 81 |
| Rhodanobacter sp. FW510-T8 | 0.38 | OKGIIK_02265 | | RNA polymerase factor sigma-54 | 0.11 | OKGIIK_11115 | fiu | Outer membrane receptor for monomeric catechols | low | > 53 |
| Lysobacter sp. OAE881 | 0.38 | ABIE51_RS15955 | | RNA polymerase factor sigma-54 | 0.24 | ABIE51_RS00595 | | TonB-dependent siderophore receptor | low | > 62 |
| Methylophilus sp. DMC18 | 0.38 | GFF2777 | | RNA polymerase sigma-54 factor | 0.25 | GFF1979 | | Ferrichrome outer membrane transporter/phage receptor | low | > 43 |
| Rhodanobacter sp000427505 FW510-R12 | 0.37 | LRK53_RS15705 | | RNA polymerase factor sigma-54 | 0.26 | LRK53_RS07205 | | TonB-dependent siderophore receptor | low | > 59 |
| Acinetobacter radioresistens SK82 | 0.37 | MPMX26_02592 | | RNA polymerase sigma-54 factor | 0.11 | MPMX26_00406 | | putative TonB-dependent receptor BfrD | low | > 36 |
| Herbaspirillum seropedicae SmR1 | 0.37 | HSERO_RS19855 | | RNA polymerase subunit sigma-54 | 0.25 | HSERO_RS22550 | | ligand-gated channel protein | — | — |
| Acidovorax sp. GW101-3H11 | 0.34 | Ac3H11_727 | | RNA polymerase sigma-54 factor RpoN | 0.22 | Ac3H11_250 | | Ferrichrome-iron receptor | low | > 79 |
| Hydrogenophaga sp. GW460-11-11-14-LB1 | 0.32 | GFF3068 | | RNA polymerase sigma-54 factor RpoN | 0.10 | GFF5752 | | Ferrichrome-iron receptor | low | > 90 |
| Rhodospirillum rubrum S1H | 0.32 | Rru_A0010 | | Sigma-54 (RpoN) (NCBI) | 0.21 | Rru_A2395 | | TonB-dependent siderophore receptor (NCBI) | low | > 58 |
| Variovorax sp. OAS795 | 0.32 | ABID97_RS04780 | | RNA polymerase factor sigma-54 | 0.25 | ABID97_RS21465 | | TonB-dependent siderophore receptor | — | — |
| Variovorax sp. SCN45 | 0.32 | GFF6290 | | RNA polymerase sigma-54 factor RpoN | 0.24 | GFF2438 | | Ferrichrome-iron receptor | low | > 127 |
| Bosea sp. OAE506 | 0.30 | ABIE41_RS00125 | | RNA polymerase factor sigma-54 | 0.18 | ABIE41_RS03600 | | TonB-dependent siderophore receptor | low | > 77 |
| Xanthobacter sp. DMC5 | 0.28 | GFF4467 | | RNA polymerase sigma-54 factor 2 | 0.24 | GFF2706 | | Ferrichrome outer membrane transporter/phage receptor | — | — |
| Sphingobium sp. HT1-2 | 0.28 | GFF776 | | RNA polymerase sigma-54 factor RpoN | 0.15 | GFF2874 | | Ferrichrome-iron receptor | low | > 95 |
| Agrobacterium fabrum C58 | 0.28 | Atu0332 | | RNA polymerase sigma-54 factor | 0.23 | Atu5311 | | TonB-dependent receptor | — | — |
| Rhizobium sp. OAE497 | 0.28 | ABIE40_RS01860 | | RNA polymerase factor sigma-54 | 0.24 | ABIE40_RS20535 | | TonB-dependent siderophore receptor | low | > 107 |
| Caulobacter crescentus NA1000 Δfur | 0.28 | CCNA_03713 | | RNA polymerase sigma-54 factor rpoN | 0.10 | CCNA_01585 | | TonB-dependent receptor | low | > 67 |
| Sphingomonas koreensis DSMZ 15582 | 0.28 | Ga0059261_2543 | | RNA polymerase, sigma 54 subunit, RpoN/SigL | 0.19 | Ga0059261_3607 | | TonB-dependent siderophore receptor | low | > 68 |
| Caulobacter crescentus NA1000 | 0.28 | CCNA_03713 | | RNA polymerase sigma-54 factor rpoN | 0.10 | CCNA_01585 | | TonB-dependent receptor | low | > 66 |
| Sinorhizobium meliloti 1021 | 0.28 | SMc01139 | | RNA polymerase factor sigma-54 | 0.25 | SMc01611 | | ferrichrome receptor precursor protein | low | > 103 |
| Azospirillum brasilense Sp245 | 0.28 | AZOBR_RS18870 | | RNA polymerase sigma54 factor | 0.24 | AZOBR_RS17965 | | ferrichrome receptor | low | > 97 |
| Brevundimonas sp. GW460-12-10-14-LB2 | 0.26 | A4249_RS16075 | | RNA polymerase factor sigma-54 | 0.05 | A4249_RS10655 | | TonB-dependent receptor | — | — |
| Azospirillum sp. SherDot2 | 0.26 | MPMX19_02668 | | RNA polymerase sigma-54 factor 2 | 0.24 | MPMX19_05479 | | Ferrichrome outer membrane transporter/phage receptor | low | > 112 |
| Rhodopseudomonas palustris CGA009 | 0.26 | TX73_000260 | | RNA polymerase factor sigma-54 | 0.22 | TX73_019885 | | TonB-dependent siderophore receptor | low | > 86 |
| Echinicola vietnamensis KMM 6221, DSM 17526 | 0.25 | Echvi_0071 | | RNA polymerase sigma-54 factor | 0.10 | Echvi_3406 | | TonB-dependent siderophore receptor | — | — |
| Pedobacter sp. GW460-11-11-14-LB5 | 0.25 | CA265_RS11005 | | RNA polymerase sigma-54 factor | 0.08 | CA265_RS18590 | | TonB-dependent siderophore receptor | — | — |
| Mucilaginibacter yixingensis YX-36 DSM 26809 | 0.24 | ABZR88_RS14570 | | RNA polymerase factor sigma-54 | 0.08 | ABZR88_RS02800 | | TonB-dependent receptor | — | — |
| Cellulophaga baltica 18 | 0.23 | M666_RS07505 | | RNA polymerase factor sigma-54 | 0.10 | M666_RS13045 | | TonB-dependent receptor | — | — |
Not shown: 15 genomes with orthologs for CSW01_12815 only; 1 genomes with orthologs for CSW01_01065 only