Sensory rhodopsin II (rainbow colored) embedded in a
lipid bilayer (heads red and tails blue) with
Transducin below it. G
t-alpha is colored red, G
t-beta blue, and G
t-gamma yellow. There is a bound
GDP molecule in the G
talpha-subunit and a bound retinal (black) in the rhodopsin. The
N-terminus terminus of rhodopsin is red and the
C-terminus blue. Presumed anchoring of transducin to the membrane has been drawn in black.
