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. 2019 Oct 24;20(21):5290. doi: 10.3390/ijms20215290

Figure 2.

Figure 2

The four receptor–G protein complexes embedded in the membrane environment. The M1 receptor is shown in orange. The M2 receptor is shown in blue. The Gαq protein is shown in green and the Gαi protein is shown in red. The lipids are shown in space-filling representation and the two layers of water molecules above/below the lipid bilayer are shown in red.