Predicted to enable serine-type endopeptidase inhibitor activity. Predicted to be involved in hyaluronan metabolic process. Predicted to act upstream of or within negative regulation of peptidase activity. Located in collagen-containing extracellular matrix. Is expressed in several structures, including genitourinary system; gut; limb segment; meninges; and sensory organ. Orthologous to human ITIH5 (inter-alpha-trypsin inhibitor heavy chain 5). [provided by Alliance of Genome Resources, Apr 2022]