Continued from family 3
| 4. Group Translocators | ||
| 4.A Phosphotransferases | ||
| 4.A.1 | PTS Glucose-glucoside | Glc |
| 4.A.2 | PTS Fructose-mannitol | Fru |
| 4.A.3 | PTS Lactose-N,N'-diacetylchitobiose-b-glucoside | Lac |
| 4.A.4 | PTS Glucitol | Gut |
| 4.A.5 | PTS Galactitol | Gat |
| 4.A.6 | PTS Mannose/fructose/sorbose | Man |
| 5. Transmembrane Electron Carriers | ||
| 5.A Two-electron carriers | ||
| 5.A.1 | Disulfide-bond oxidoreductase D | DsbD |
| 5.A.2 | Disulfide-bond oxidoreductase B | DsbB |
| 5.B One-electron carriers | ||
| 5.B.1 | Phagocyte NADPH oxidase | Gp91phox |
| 8. Accessory Factors Involved in Transport | ||
| 8.A Auxiliary transport proteins | ||
| 8.A.1 | Membrane fusion protein | MFP |
| 8.A.2 | Secretin auxiliary lipoprotein | SAL |
| 8.A.3 | Cytoplasmic membrane-periplasmic auxiliary-1 protein | MPA1 |
| plus a cytoplasmic domain | MPA1-C or MPA1+C | |
| 8.A.4 | Cytoplasmic membrane-periplasmic auxiliary-2 protein | MPA2 |
| 8.A.5 | Voltage-gated K+ channel b-subunit | VICb |
| 8.A.6 | Auxiliary nutrient transporter | ANT |
| 8.A.7 | Phosphotransferase system enzyme I | EI |
| 8.A.8 | Phosphotransferase system heat-stable protein | HPr |
| 8.A.9 | rBAT transport accessory protein | rBAT |
| 8.A.10 | Slow voltage-gated K+ channel accessory protein | MinK |
| 8.A.11 | Phospholamban (Ca2+-ATPase regulator) | PLB |
| 8.A.12 | ABC bacteriocin exporter accessory protein | BEA |
| 8.A.13 | Tetratricopeptide repeat | Tpr1 |
| 9 Incompletely Characterized Transport Systems | ||
| 9.A Transporters of unknown classification | ||
| 9.A.1 | Polysaccharide transporter | PST |
| 9.A.2 | Mercuric ion (Hg2+) porter-1 | MerTP |
| 9.A.3 | Mercuric ion (Hg2+) porter-2 | MerC |
| 9.A.4 | Nicotinamide mononucleotide uptake porter | PnuC |
| 9.A.5 | Peroxisomal protein importer | PPI |
| 9.A.6 | Intracellular nucleoside transporter | INT |
| 9.A.7 | Mercuric ion (Hg2+) porter-3 | MerF |
| 9.A.8 | Ferrous ion uptake protein | FeoB |
| 9.A.9 | Low-affinity Fe2+ transporter | FeT |
| 9.A.10 | Oxidase-dependent Fe2+ transporter | OFeT |
| 9.A.11 | Copper transporter-1 | Ctr1 |
| 9.A.12 | Copper transporter-2 | Ctr2 |
| 9.A.13 | Colicin J lysis factor | Cjl |
| 9.A.14 | Nuclear pore complex | NPC |
| 9.A.15 | Tryptophan importer | YhaG |
| 9.A.16 | Lysosomal protein importer | LPI |
| 9.A.17 | Pb2+ importer | PbrT |
| 9.A.18 | Peptide uptake porter | PUP |
| 9.A.19 | Mg2+ transporter-E | MgtE |
| 9.A.20 | Low-affinity cation transporter | LCT |
| 9.A.21 | DNA uptake competence factor | ComC |
| 9.A.22 | NhaE Na+(K+):H+ antiporter | NhaE |
| 9.A.23 | Ferroportin | FP |
In the present classification the categories appearing in the introductory table on transport mechanisms are included as follows: 1.2 and 2.1 in Class 1 (Pores and channels), 2.2.1 and 2.2.3 in Subclass 2.A (Porters), 2.2.2 in Class 3 (Primary active transporters) and 2.3 in Class 4 (Group translocators). Categories 1.1, 1.3, 1.4 and 2.4 are not included in the present system.