Gastricsin is an alias for the gene, Progastricsin (pepsinogen C), in humans. Other names include: Gastricsin; Pepsinogen C; Gastricsin ; PGII. The encoded protein is an enzyme with an amino acid length of 388 and a mass of 42.4 kDa. Other isoforms may exist. Gastricsin is a member of the Peptidase A1 family. This gene shares homology with other species, including: Fly, Mouse, Rat, Frog, Chicken.