| Organism | Ratio1 | Gene1 | Name1 | Description1 | Ratio2 | Gene2 | Name2 | Description2 | Cofit | Rank |
| Azospirillum sp. SherDot2 | 1.0 | MPMX19_00795 | | Adaptive-response sensory-kinase SasA | 1.0 | MPMX19_04883 | | Spermidine-binding periplasmic protein SpuE | 0.54 | 4 |
| Azospirillum brasilense Sp245 | 0.70 | AZOBR_RS10795 | | histidine kinase | 0.86 | AZOBR_RS08845 | | ABC transporter substrate-binding protein | low | > 97 |
| Magnetospirillum magneticum AMB-1 | 0.40 | AMB_RS14565 | | sensor histidine kinase | 0.37 | AMB_RS13210 | | polyamine ABC transporter substrate-binding protein | low | > 64 |
| Marinobacter adhaerens HP15 | 0.36 | HP15_3483 | | two-component, sensor histidine kinase | 0.34 | HP15_940 | | putrescine ABC transporter, periplasmic putrescine-binding protein | — | — |
| Xanthobacter sp. DMC5 | 0.36 | GFF3128 | | Adaptive-response sensory-kinase SasA | 0.40 | GFF1739 | | Putrescine-binding periplasmic protein SpuD | — | — |
| Bosea sp. OAE506 | 0.35 | ABIE41_RS21435 | | ATP-binding protein | 0.37 | ABIE41_RS21650 | | polyamine ABC transporter substrate-binding protein | low | > 77 |
| Rhizobium sp. OAE497 | 0.33 | ABIE40_RS05705 | | ATP-binding protein | 0.41 | ABIE40_RS03265 | | polyamine ABC transporter substrate-binding protein | low | > 107 |
| Sinorhizobium meliloti 1021 | 0.32 | SMc02367 | | sensor histidine kinase transmembrane protein | 0.40 | SMc00770 | | putrescine-binding periplasmic protein | low | > 103 |
| Agrobacterium fabrum C58 | 0.32 | Atu0979 | | two component sensor kinase | 0.41 | Atu0609 | | ABC transporter, substrate binding protein (putrescine) | low | > 89 |
| Rhodospirillum rubrum S1H | 0.31 | Rru_A2914 | | Periplasmic Sensor Signal Transduction Histidine Kinase (NCBI) | 0.46 | Rru_A1018 | | extracellular solute-binding protein, family 1 (NCBI) | low | > 58 |
| Rhodopseudomonas palustris CGA009 | 0.31 | TX73_009960 | | HAMP domain-containing sensor histidine kinase | 0.37 | TX73_010380 | | polyamine ABC transporter substrate-binding protein | — | — |
| Caulobacter crescentus NA1000 Δfur | 0.27 | CCNA_02842 | | two-component sensor histidine kinase | 0.26 | CCNA_03239 | | spermidine/putrescine-binding protein | low | > 67 |
| Caulobacter crescentus NA1000 | 0.27 | CCNA_02842 | | two-component sensor histidine kinase | 0.26 | CCNA_03239 | | spermidine/putrescine-binding protein | low | > 66 |
| Pseudomonas fluorescens FW300-N2E3 | 0.26 | AO353_25495 | | histidine kinase | 0.43 | AO353_08575 | | ABC transporter substrate-binding protein | low | > 101 |
| Pseudomonas sp. DMC3 | 0.23 | GFF1577 | | Adaptive-response sensory-kinase SasA | 0.44 | GFF2732 | | Spermidine-binding periplasmic protein SpuE | low | > 89 |
| Pseudomonas sp. RS175 | 0.23 | PFR28_02432 | | Adaptive-response sensory-kinase SasA | 0.45 | PFR28_01484 | | Spermidine-binding periplasmic protein SpuE | low | > 88 |
| Pseudomonas sp. SVBP6 | 0.22 | COO64_RS09980 | | HAMP domain-containing sensor histidine kinase | 0.42 | COO64_RS00885 | | polyamine ABC transporter substrate-binding protein | low | > 93 |
| Hydrogenophaga sp. GW460-11-11-14-LB1 | 0.21 | GFF1758 | | periplasmic sensor signal transduction histidine kinase | 0.25 | GFF2035 | | Putrescine ABC transporter putrescine-binding protein PotF (TC 3.A.1.11.2) | low | > 90 |
| Pseudomonas fluorescens SBW25 | 0.21 | PFLU_RS12565 | | HAMP domain-containing histidine kinase | 0.44 | PFLU_RS12535 | | polyamine ABC transporter substrate-binding protein | low | > 109 |
| Pseudomonas fluorescens SBW25-INTG | 0.21 | PFLU_RS12565 | | HAMP domain-containing histidine kinase | 0.44 | PFLU_RS12535 | | polyamine ABC transporter substrate-binding protein | low | > 109 |
| Pseudomonas syringae pv. syringae B728a ΔmexB | 0.21 | Psyr_3128 | | ATP-binding region, ATPase-like:Histidine kinase, HAMP region:Histidine kinase A, N-terminal | 0.44 | Psyr_4864 | | extracellular solute-binding protein, family 1 | low | > 86 |
| Pseudomonas syringae pv. syringae B728a | 0.21 | Psyr_3128 | | ATP-binding region, ATPase-like:Histidine kinase, HAMP region:Histidine kinase A, N-terminal | 0.44 | Psyr_4864 | | extracellular solute-binding protein, family 1 | low | > 86 |
| Pseudomonas simiae WCS417 | 0.21 | PS417_11820 | | histidine kinase | 0.43 | PS417_11790 | | ABC transporter substrate-binding protein | low | > 88 |
| Pseudomonas lactucae CFBP13502 | 0.21 | GEMAOFIL_02647 | | Adaptive-response sensory-kinase SasA | 0.42 | GEMAOFIL_05564 | | Spermidine-binding periplasmic protein SpuE | low | > 93 |
| Pseudomonas fluorescens FW300-N2E2 | 0.20 | Pf6N2E2_503 | | sensor histidine kinase | 0.45 | Pf6N2E2_1770 | | Putrescine ABC transporter putrescine-binding protein PotF (TC 3.A.1.11.2) | low | > 103 |
| Pseudomonas fluorescens FW300-N1B4 | 0.20 | Pf1N1B4_4266 | | sensor histidine kinase | 0.44 | Pf1N1B4_4825 | | Putrescine ABC transporter putrescine-binding protein PotF (TC 3.A.1.11.2) | — | — |
| Pseudomonas fluorescens FW300-N2C3 | 0.20 | AO356_23120 | | histidine kinase | 0.45 | AO356_29815 | | spermidine/putrescine ABC transporter substrate-binding protein | low | > 104 |
Not shown: 7 genomes with orthologs for MPMX19_00795 only; 47 genomes with orthologs for MPMX19_04883 only