The KCN classification system
| Name | Protein |
|---|---|
| KCNA1–KCNA7 | 6TM1P KV channel (Shaker-related) |
| KCNB1, KCNB2 | 6TM1P KV channel (Shab-related) |
| KCNC1–KCNC4 | 6TM1P KV channel (Shaw-related) |
| KCND1–KCND3 | 6TM1P KV channel (Shal-related) |
| KCNE1–KCNE3 | 1TM/ISK accessory subunit |
| KCNF1 | 6TM1P KV channel (modulatory) |
| KCNG1–KCNG2 | 6TM1P KV channel (modulatory) |
| KCNH1–KCNH5 | 6TM1P KV channel (EAG, ERG, ELK) |
| KCNI1 | |
| KCNJ1–KCNJ15 | 2TM/1P Kir channel |
| KCNK1–KCNK9 | 4TM/2P (TWIK, TASK, TREK) |
| KCNL | |
| KCNMA1 | 7TM/1P maxi-KCa channel |
| KCNMB1 | β subunit of maxi-KCa channel |
| KCNN1–KCNN4 | 6TM1P SKCa and IKCa channel |
| KCNO | |
| KCNP | |
| KCNQ1–KCNQ4 | 6TM1P KV channel |
| KCNR | |
| KCNS1–KCNS3 | 6TM1P KV channel (modulatory) |