Potassium channel, subfamily K, member 1 is an alias for the gene, Potassium channel, two pore domain subfamily K, member 1, in humans. Other names include: Potassium channel subfamily K member 1; Inward rectifying potassium channel protein TWIK-1; Potassium channel K2P1; Potassium channel KCNO1; tandem of P domains in a weak inward rectifying K+ channel 1; DPK; HOHO; K2P1; K2p1.1; KCNO1; TWIK-1; TWIK1. The encoded protein has an amino acid length of 336 and a mass of 38.1 kDa. Other isoforms may exist. Potassium channel, subfamily K, member 1 is a member of the Two pore domain potassium channel (TC 1.A.1.8) family. This gene shares homology with other species, including: Frog.