SPINK4 encodes the human gene, Serine peptidase inhibitor, Kazal type 4. It may also be known as: Serine protease inhibitor Kazal-type 4; Peptide PEC-60 homolog; HEL136; PEC-60; PEC60. The encoded protein has an amino acid length of 86 and a mass of 9.5 kDa. Other isoforms may exist. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Chicken.