Anti-HRG1 antibodies are protein reagents that detect specific antigens. The HRG1 antigen is another term for the human protein neuregulin 1, encoded by the NRG1 gene. The protein is known to function in the differentiation of certain cell types, among other biological roles. Canonically, it has an amino acid length of 640 residues and a mass of 70.4 kilodaltons. Its subcellular localization is in the cell membrane. The HRG1 protein is a member of the Neuregulin protein family.