Chondroitin sulfate- and hyaluronan-binding proteoglycan involved in the organization of interphotoreceptor matrix; may participate in the maturation and maintenance of the light-sensitive photoreceptor outer segment. Binds heparin. Expressed in the retina (at protein level) (PubMed:12589770, PubMed:29777959). Expressed in the pineal gland (PubMed:12589770). Increasing expression in retina from 15 dpc to adulthood: expressed at P8 when photoreceptor outer segments are in active stages of elongation; elevated expression at P10 in the developing IPM and at P15 in the region adjacent to the retina pigment epithelium (RPE). From P18 to P35, more homogeneously present in the IPM surrounding both cones and rods. Truncated N-terminus.