AC4 is an alias for the gene, Adenylate cyclase 4, in humans. Other names include: Adenylate cyclase type 4; ATP pyrophosphate-lyase 4; Adenylate cyclase type IV; Adenylyl cyclase 4; Adenylate cyclase type 4 . The encoded protein is an enzyme with an amino acid length of 1077 and a mass of 119.8 kDa. AC4 is a member of the Adenylyl cyclase class-4/guanylyl cyclase family. This gene shares homology with other species, including: Mouse, Rat, Frog.