Anti-CTAGE1 antibodies are used in the immunodetection of the protein cutaneous T cell lymphoma-associated antigen 1. In humans, the canonical protein has a reported length of 745 amino acid residues and a mass of 85.3 kDa. Its subcellular localization is in the membrane. Alternative splicing is reported to yield 2 different isoforms for this protein. It is notably expressed in the testis. A member of the CTAGE protein family, it is known to be involved with Golgi transport. Synonyms for this target antigen include cancer/testis antigen 21.2, cancer/testis antigen family 21, member 1, cancer/testis antigen family 21, member 2, cutaneous T-cell lymphoma-associated antigen 2, protein cTAGE-2, and cTAGE family member 2.