*Chloride channels: This superfamily of channels consists of approximately 13 members. They include ClCs, CLICs, Bestrophins and CFTRs. These channels are non-selective for small anions; however chloride is the most abundant anion, and hence they are known as chloride channels.
*Potassium channels
**Voltage-gated potassium channels e.g., Kvs, Kirs etc.
**Calcium-activated potassium channels e.g., BKCa or MaxiK, SK, etc.
**Inward-rectifier potassium channels
**Two-pore-domain potassium channels: This family of 15 members form what is known as leak channels, and they display Goldman-Hodgkin-Katz (open) rectification.
*Sodium channels
** Voltage-gated sodium channels (NaVs)
** Epithelial sodium channels (ENaCs)
*Calcium channels (CaVs)
*Proton channels
**Voltage-gated proton channels
*Non-selective cation channels: These non-selectively allow many types of cations, mainly Na, K and Ca, through the channel.
**Most transient receptor potential channels