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 pineal gland and the outer layer of the retina. Expressed in the photoreceptor cells of the retina at E16 and in pineal gland at E21. Expressed at P5 in photoreceptor cells and P6 in the pineal gland at protein level.