Purkinje cell protein 4, or, PCP4, is a human gene. Other names include: Brain-specific antigen PCP-4; Brain-specific polypeptide PEP-19; PEP-19. The encoded protein has an amino acid length of 62 and a mass of 6.8 kDa. Other isoforms may exist. Purkinje cell protein 4 is a member of the PCP4 family. This gene shares homology with other species, including: Mouse, Rat, Chicken.