Enables glycosaminoglycan binding activity. Acts upstream of or within extracellular matrix organization; peptide cross-linking via chondroitin 4-sulfate glycosaminoglycan; and positive regulation of cell-substrate adhesion. Located in basement membrane and interstitial matrix. Is expressed in hair follicle and rib. Orthologous to human EGFLAM (EGF like, fibronectin type III and laminin G domains). [provided by Alliance of Genome Resources, Apr 2022]