CPA is an alias for the gene, Carboxypeptidase A1, in humans. Other names include: Carboxypeptidase A1 ; pancreatic carboxypeptidase A; carboxypeptidase A1 (pancreatic). The encoded protein is an enzyme with an amino acid length of 419 and a mass of 47.1 kDa. CPA is a member of the Peptidase M14 family. This gene shares homology with other species, including: Mouse.