ATP8B1 is a symbol for the gene, ATPase, aminophospholipid transporter, class I, type 8B, member 1, in humans. Other names include: Phospholipid-transporting ATPase IC; ATPase class I type 8B member 1; Familial intrahepatic cholestasis type 1; P4-ATPase flippase complex alpha subunit ATP8B1; Phospholipid-transporting ATPase IC ; ATPIC; BRIC; FIC1; ICP1; PFIC; PFIC1. The encoded protein is an enzyme with an amino acid length of 1251 and a mass of 143.7 kDa. Other isoforms may exist. ATP8B1 is a member of the Cation transport ATPase (P-type) (TC 3.A.3) family, Type IV subfamily. This gene shares homology with other species, including: Rat, Zebrafish.