Anti-EP3A antibodies are protein reagents that detect specific antigens. The EP3A antigen is another term for the human protein epididymal protein 3A, encoded by the EDDM3A gene. Canonically, it has an amino acid length of 147 residues and a mass of 17.6 kilodaltons. It is a secreted protein and it is expressed in the epididymis and testis.