Enables collagen binding activity. Involved in several processes, including negative regulation of cell death; positive regulation of cell population proliferation; and positive regulation of collagen biosynthetic process. Located in apical plasma membrane. Used to study alcoholic liver cirrhosis. Biomarker of alcoholic liver cirrhosis. Human ortholog(s) of this gene implicated in gastrointestinal system cancer (multiple); osteoarthritis; and spondylometaepiphyseal dysplasia, short limb-hand type. Orthologous to human DDR2 (discoidin domain receptor tyrosine kinase 2). [provided by Alliance of Genome Resources, Apr 2022]