Light sensitive pigment formed from retinal linked through a Schiff's base to opsin: rhodopsin is an integral membrane protein found in the discs of retinal rods and cones, comprising some 40% of the membrane. Vertebrate opsins are proteins of 38 kD.

See: bacteriorhodopsin.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

(11 Mar 2008)