Anti-TAP2 antibodies are used in the immunodetection of the protein transporter 2, ATP binding cassette subfamily B member. In humans, the canonical protein has a reported length of 686 amino acid residues and a mass of 75.7 kDa. Its subcellular localization is in the ER. Up to 2 different isoforms have been reported for this protein. It is notably expressed in many tissues, such as the appendix and placenta. A member of the ABCB protein family, TAP2 is known to be involved with protein transport. The TAP2 gene has been associated with the disease, Bare lymphocyte syndrome. Synonyms for this target antigen include ABCB3, APT2, D6S217E, PSF-2, PSF2, RING11, antigen peptide transporter 2, and ABC18. TAP2 gene orthologs have been reported in the mouse, rat, frog, chimpanzee and chicken species.