Anti-WAP3 antibodies enable researchers to detect and measure the WAP3 antigen in biological samples. This target is a reported synonym of the PI3 gene, which encodes peptidase inhibitor 3. This protein is known to function in innate immune responses, among other biological roles. The human version of WAP3 has a canonical amino acid length of 117 residues and a protein mass of 12.3 kilodaltons. It is reported to be a secreted protein that is notably expressed in the vagina, tonsil, skin, oral mucosa, and esophagus. Other names for this target antigen include ESI and SKALP. Indicated applications for WAP3 antibodies listed below include ELISA, Western Blot, Immunocytochemistry, and Immunohistochemistry.