Enables heparin binding activity and serine-type endopeptidase inhibitor activity. Involved in acute inflammatory response to antigenic stimulus; lactation; and response to nutrient. Located in extracellular space. Used to study thrombosis. Biomarker of familial hyperlipidemia; nephrotic syndrome; and ovarian cancer. Human ortholog(s) of this gene implicated in antithrombin III deficiency; disseminated intravascular coagulation; intermediate coronary syndrome; thrombosis; and toxic shock syndrome. Orthologous to human SERPINC1 (serpin family C member 1). [provided by Alliance of Genome Resources, Apr 2022]