Anti-CT11.2 antibodies enable researchers to detect and measure the CT11.2 antigen in biological samples. This target is a reported synonym of the SPANXB1 gene, which encodes SPANX family member B1. This protein is known to function in spermatid development, among other biological roles. The human version of CT11.2 has a canonical amino acid length of 103 residues and a protein mass of 11.8 kilodaltons. It is reported to be localized in the nucleus and cytoplasm of cells and notably expressed in the testis. CT11.2 is a member of the SPAN-X protein family.