Anti-SPINK6 antibodies are used in the immunodetection of the protein serine peptidase inhibitor Kazal type 6. In humans, the canonical protein has a reported length of 80 amino acid residues and a mass of 8.6 kDa. It is known to be a secreted protein. SPINK6 is a type of serine protease inhibitor selective for kallikreins. Synonyms for this target antigen include acrosin inhibitor, kallikrein inhibitor, protease inhibitor H, and serine protease inhibitor Kazal-type 6.