Enables several functions, including collagen binding activity; dipeptidyl-peptidase activity; and identical protein binding activity. Involved in several processes, including B-1a B cell differentiation; proteolysis; and regulation of lymphocyte mediated immunity. Located in several cellular components, including Golgi apparatus; cell surface; and endoplasmic reticulum. Human ortholog(s) of this gene implicated in Middle East respiratory syndrome and type 2 diabetes mellitus. Orthologous to human DPP4 (dipeptidyl peptidase 4). [provided by Alliance of Genome Resources, Apr 2022]