Predicted to enable serine-type endopeptidase inhibitor activity. Predicted to be involved in cell differentiation; central nervous system development; and negative regulation of serine-type peptidase activity. Predicted to act upstream of or within negative regulation of serine-type endopeptidase activity. Predicted to be located in extracellular region. Orthologous to human SPINK6 (serine peptidase inhibitor Kazal type 6). [provided by Alliance of Genome Resources, Apr 2022]