TC classa | Class description | No. of proteins | TC subclass | Subclass description | No. of proteins |
---|---|---|---|---|---|
1 | Channel/Pore | 21 | 1.A | α-type channel | 18 |
 |  |  | 1.B | β-type porin | 3 |
2 | Secondary carrier | 153 | 2.A | Porter (uniporter, symporter, antiporter) | 153 |
3 | Primary active transporter | 146 | 3.A | P-P-bond hydrolysis-driven transporter | 124 |
 |  |  | 3.B | Decarboxylation-driven transporter | 4 |
 |  |  | 3.D | Oxidoreduction-driven transporter | 18 |
4 | Group translocator | 7 | 4.A | Phosphotransfer-driven group translocator | 2 |
 |  |  | 4.C | Acyl CoA ligase-coupled transporter | 5 |
5 | Transmembrane electron carrier | 10 | 5.A | Transmembrane 2-electron transfer carrier | 10 |
8 | Auxiliary transport proteinb | 8 | 8.A | Auxiliary transport protein | 8 |
9 | Poorly defined system | 10 | 9.A | Recognized transporter of unknown biochemical mechanism | 10 |
Total | Â | 355 | Â | Â | 355 |