Chondroitin sulfate-, heparin- and hyaluronan-binding protein (By similarity). May serve to form a basic macromolecular scaffold comprising the insoluble interphotoreceptor matrix (PubMed:9813076). Expressed in the retina (at protein level) (PubMed:10601738, PubMed:29777959). In the retina, specifically expressed by cone and rod photoreceptor cells (PubMed:9813076). Localizes to cone and rod photoreceptor cells surrounding the interphotoreceptor matrix of the retina (PubMed:9719680). Expressed in the retina lens at 6 weeks post-conception (WPC) (at protein level) (PubMed:29777959). Expressed in the neural retinal between 6 and 19 WPC (at protein level) (PubMed:29777959). Expressed in developing photoreceptors and emerging interphotoreceptor matrix between 12 and 19 WPC (at protein level) (PubMed:29777959). The N-terminus is blocked. Highly glycosylated (N- and O-linked carbohydrates and sialic acid). The disease is caused by variants affecting the gene represented in this entry. The disease is caused by variants affecting the gene represented in this entry.