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.
Subcellular locations: Photoreceptor outer segment membrane, Photoreceptor inner segment membrane, Secreted, Extracellular space, Extracellular matrix, Interphotoreceptor matrix
Expressed in the retina (at protein level) (, ). Expressed by photoreceptors of the interphotoreceptor matrix (IPM) surrounding both rods and cones (at protein level) (, ). IPM occupies the subretinal space between the apices of the retinal pigment epithelium and the neural retina . Expressed in the pineal gland (at protein level) .