Predicted to enable serine-type endopeptidase inhibitor activity. Acts upstream of or within several processes, including extracellular matrix organization; prostate gland morphogenesis; and regulation of epithelial cell proliferation. Located in cytoplasm. Is expressed in several structures, including alimentary system; genitourinary system; integumental system; respiratory system; and sensory organ. Orthologous to human SERPINB5 (serpin family B member 5). [provided by Alliance of Genome Resources, Apr 2022]