part of part of photoreceptor outer segment organelle membrane photoreceptor disc membrane Stack of disc membranes located inside a photoreceptor outer segment, and containing densely packed molecules of photoreceptor proteins that traverse the lipid bilayer. Disc membranes arise as evaginations of the ciliary membrane during the development of the outer segment and may or may not remain contiguous with the ciliary membrane. GO:0097381 pr cellular_component 2012-10-05T11:01:22Z