cytoplasmic vesicle membrane photoreceptor disc membrane rod photoreceptor disc membrane https://github.com/geneontology/go-ontology/issues/17217 2019-05-07T23:27:06Z GO:0120202 cellular_component krc Stack of disc membranes located inside a rod photoreceptor outer segment, and containing densely packed molecules of rhodopsin photoreceptor proteins that traverse the lipid bilayer. It is thought that rod disc membranes arise as evaginations of the ciliary membrane near the base of the outer segment, which then become completely separated from the ciliary membrane, during the development of the rod outer segment.