Anti-GP180 antibodies enable researchers to detect and measure the GP180 antigen in biological samples. This target is a reported synonym of the CPD gene, which encodes carboxypeptidase D. This protein is known to function in metabolic processes, among other biological roles. The human version of GP180 has a canonical amino acid length of 1380 residues and a protein mass of 152.9 kilodaltons, although 2 isoforms have been identified. It is reported to be localized in the cell membrane of cells and widely expressed in many tissue types. GP180 is a member of the Peptidase M14 protein family.