Fig. 13 Receptors for plasma retinol binding protein on the basal and basolateral membrane of the retinal pigment epithelium, visualized by autoradiography (silver deposits) of iodine-125-labeled retinol binding protein. (Bok D: Retinal photoreceptor-pigment epithelium interactions. Invest Ophthalmol Vis Sci 26:1659, 1985)