Predicted to enable serine-type endopeptidase inhibitor activity. Predicted to be involved in negative regulation of endopeptidase activity. Predicted to act upstream of or within negative regulation of peptidase activity. Predicted to be located in cytoplasm. Predicted to be active in extracellular space. Is expressed in several structures, including gut; hemolymphoid system; liver; nose; and reproductive system. Orthologous to human SERPINB11 (serpin family B member 11). [provided by Alliance of Genome Resources, Apr 2022]