Anti-menD antibodies are protein reagents that detect specific antigens. The menD antigen is another term for the human protein EBP cholestenol delta-isomerase, encoded by the EBP gene. The protein is known to catalyze the conversion of Delta(8)-sterols to their corresponding Delta(7)-isomers. Canonically, it has an amino acid length of 230 residues and a mass of 26.4 kilodaltons. Its subcellular localization is in the nucleus, ER, and cytoplasmic vesicles and it is expressed in many tissues, such as the colon, testis, and adrenal gland. The menD protein is a member of the EBP protein family.