Anti-HTN5 antibodies enable researchers to detect and measure the HTN5 antigen in biological samples. This target is a reported synonym of the HTN3 gene, which encodes histatin 3. The human version of HTN5 has a canonical amino acid length of 51 residues and a protein mass of 6.1 kilodaltons. It is reported to be a secreted protein that is notably expressed in the salivary gland. Other names for this target antigen include HIS2, HIS2, and HTN2.