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Ribbon and space-filling model of a complex between two rhodopsin dimers and a dimer of Gtα. Information obtained from atomic force microscopy and from the crystal structures of rhodopsin and transducin suggests a 2:1 stoichiometry between rhodopsin (blue) and Gtα (orange). Signaling may proceed via oligomers of rhodopsin and oligomers of Gtα (adapted from ref 54).
