Anti-CT11.4 antibodies enable researchers to detect and measure the CT11.4 antigen in biological samples. This target is a reported synonym of the SPANXD gene, which encodes SPANX family member D. The human version of CT11.4 has a canonical amino acid length of 97 residues and a protein mass of 11 kilodaltons. It is reported to be localized in the nucleus and cytoplasm of cells and notably expressed in the testis. CT11.4 is a member of the SPAN-X protein family.