Transmembrane channel formation in rhodopsin-containing bilayer membranes

Abstract
Rhodopsin [from bovine rod outer segments] was incorporated into planar lipid bilayer membranes. The effect of light was to increase the bilayer permeability in a pattern consistent with the formation of a transmembrane channel of about 10 .ANG. diameter. A model of visual excitation based on a light-activated and voltage-sensitive channel was presented.