Predicted to enable serine-type endopeptidase inhibitor activity. Predicted to be involved in hyaluronan metabolic process and negative regulation of endopeptidase activity. Predicted to act upstream of or within extracellular matrix organization. Predicted to be located in extracellular matrix. Orthologous to human ITIH1 (inter-alpha-trypsin inhibitor heavy chain 1). [provided by Alliance of Genome Resources, Apr 2022]