Paraneoplastic Ma antigen family member 5 is a human gene encoded by the symbol, PNMA5. It may also be known as: Paraneoplastic antigen-like protein 5; Tumor antigen BJ-HCC-25; paraneoplastic antigen family 5. The encoded protein has an amino acid length of 448 and a mass of 49.9 kDa. Other isoforms may exist. Paraneoplastic Ma antigen family member 5 is a member of the PNMA family. Homologs of this gene exist in other organisms, including: Mouse, Rat.