Anti-Steroid 5 Alpha Reductase 1 antibodies enable researchers to detect and measure the Steroid 5 Alpha Reductase 1 antigen in biological samples. This target is a reported synonym of the SRD5A1 gene, which encodes steroid 5 alpha-reductase 1. This protein is known to function in bone development and cell differentiation, among other biological roles. The human version of Steroid 5 Alpha Reductase 1 has a canonical amino acid length of 259 residues and a protein mass of 29.5 kilodaltons. It is reported to be localized in the ER of cells and widely expressed in many tissue types. Steroid 5 Alpha Reductase 1 is a member of the Steroid 5-alpha reductase protein family.