Ready-to-use ELISA kits are available for the detection of P antigen family, member 4 (prostate associated), an alias of the protein, PAGE family member 4. The official gene symbol is PAGE4. The protein has a mass of 11.2 kDa and length of 102 residues. It is a member of the GAGE family and may be known by other names, including: GAGEC1, GAGE-9, prostate-associated gene protein 4, g antigen family C member 1, P antigen family member 4 (prostate associated), and P antigen family member 4, and JM27.