Predicted to enable serine-type endopeptidase inhibitor activity. Predicted to be involved in negative regulation of endopeptidase activity. Predicted to be located in extracellular space. Human ortholog(s) of this gene implicated in otitis media. Orthologous to human A2ML1 (alpha-2-macroglobulin like 1). [provided by Alliance of Genome Resources, Apr 2022]