Anti-HIS1 antibodies enable researchers to detect and measure the HIS1 antigen in biological samples. This target is a reported synonym of the HTN1 gene, which encodes histatin 1. The human version of HIS1 has a canonical amino acid length of 57 residues and a protein mass of 7 kilodaltons. It is reported to be a secreted protein that is notably expressed in the testis. HIS1 is a member of the Histatin/statherin protein family.