Predicted to enable serine-type endopeptidase inhibitor activity. Predicted to be involved in negative regulation of endopeptidase activity. Predicted to be located in endoplasmic reticulum. Predicted to be active in extracellular space. Orthologous to human SERPINA2 (serpin family A member 2 (gene/pseudogene)). [provided by Alliance of Genome Resources, Apr 2022]