Anti-caspr5 antibodies enable researchers to detect and measure the caspr5 antigen in biological samples. This target is a reported synonym of the CNTNAP5 gene, which encodes contactin associated protein family member 5. This protein is known to function in cell adhesion, among other biological roles. The human version of caspr5 has a canonical amino acid length of 1306 residues and a protein mass of 145.6 kilodaltons. It is reported to be localized in the membrane of cells. caspr5 is a member of the Neurexin protein family.