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 extracellular region. Predicted to be active in extracellular space. Orthologous to human SERPINA11 (serpin family A member 11). [provided by Alliance of Genome Resources, Apr 2022]