Connection between RIS and ROS

Bovine photoreceptor cell (rod cell) with connecting cilium between RIS (lower part) and ROS (upper part). Note intramembranous proteins (opsin) in the plasma membrane of the cilium between RIS and ROS. A calical process is located at the left side of the cilium. Note the different distribution of intramembranous proteins in the plasma membrane of the ciliar region compared to the RIS plasma membrane.

bar: 500nm, Freeze Fracture