Anti-B melanoma antigen family member 3 antibodies are used in antigen-specific immunodetection in biological samples. The target B melanoma antigen family member 3 is a known alias name of the protein BAGE family member 3, encoded by the BAGE3 gene in humans. This 109-amino acid residue protein is a member of the BAGE protein family. The protein is secreted and features post-translational modifications.