Fig. 7. G protein coupling of dopamine receptors.
a The structures of the D1R–Gs, D2R–Gi, D3R–Gi, D4R–Gi, and D5R–Gs complexes. b Comparison of the G protein conformations among the structures of D1R–Gs, D2R–Gi, D3R–Gi, D4R–Gi, and D5R–Gs complexes. c Structural comparison focused on the α5 helix of the Gα subunit bound to dopamine receptors. d Comparison of the G protein conformations among the structures of D1R–Gs and D5R–Gs complexes. e Comparison of the G protein conformations among the structures of D2R–Gi, D3R–Gi, and D4R–Gi complexes.