Potassium voltage-gated channel subfamily B member 1, Delayed rectifier potassium channel 1, DRK1, h-DRK1, Voltage-gated potassium channel subunit Kv21, KCNB1
Mediates the voltage-dependent potassium ion permeability of excitable membranes. Channels open or close in response to the voltage difference across the membrane, letting potassium ions pass in accordance with their electrochemical gradient.