Predicted to enable heparin binding activity and hyaluronic acid binding activity. Acts upstream of or within extracellular matrix organization. Located in interphotoreceptor matrix. Human ortholog(s) of this gene implicated in retinitis pigmentosa and vitelliform macular dystrophy. Orthologous to human IMPG1 (interphotoreceptor matrix proteoglycan 1). [provided by Alliance of Genome Resources, Apr 2022]