Anti-TEX40 antibodies enable researchers to detect and measure the TEX40 antigen in biological samples. This target is a reported synonym of the CATSPERZ gene, which encodes catsper channel auxiliary subunit zeta. This protein is known to function in spermatogenesis, among other biological roles. The human version of TEX40 has a canonical amino acid length of 200 residues and a protein mass of 22.8 kilodaltons. It is reported to be localized in the cell projections and membrane of cells. Other names for this target antigen include C11orf20 and cation channel sperm-associated auxiliary subunit zeta.