Predicted to enable cysteine-type endopeptidase inhibitor activity; protease binding activity; and signaling receptor binding activity. Predicted to be involved in several processes, including antimicrobial humoral immune response mediated by antimicrobial peptide; negative regulation of blood coagulation; and negative regulation of endopeptidase activity. Located in collagen-containing extracellular matrix. Human ortholog(s) of this gene implicated in high molecular weight kininogen deficiency. Orthologous to human KNG1 (kininogen 1). [provided by Alliance of Genome Resources, Apr 2022]