fotoreseptormembranen
Fotoreseptormembranen refers to the specialized membrane structures that constitute the outer segments of retinal photoreceptor cells, namely rods and cones. These membranes are organized into a stack of disk-like or stack‑like folds that contain the visual pigment molecules responsible for light detection. In rods, the disks are largely closed vesicles that form the inner portion of each disk, while in cones the disks are continuous with the plasma membrane, allowing for a greater continuous exposure to light. The membranes are tightly packed to maximize the surface area for photon absorption and to provide a stable environment for photopigment regeneration.
The lipid bilayer of the photoreceptor membranes is composed primarily of phosphatidylcholine, phosphatidylethanolamine, and various glycolipids,
The dynamic maintenance of photoreseptormembranen is supported by specialized trafficking pathways. Newly synthesized opsins are transported
Dysfunction or degeneration of photoreseptormembranen underlies several retinal diseases. Conditions such as Stargardt disease, retinitis pigmentosa,