Anti-CTPA antibodies enable researchers to detect and measure the CTPA antigen in biological samples. This target is a reported synonym of the EPHA2 gene, which encodes EPH receptor A2. This protein is known to function in GTPase activation and cell adhesion, among other biological roles. The human version of CTPA has a canonical amino acid length of 976 residues and a protein mass of 108.3 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane of cells. CTPA is a member of the Tyr protein kinase protein family.