Fig. 4: Structural features for zGPR4.
From: Cryo-EM structure of an activated GPR4–Gs signaling complex

a Side view of the zGPR4 orthostatic pocket showing a bunch of aromatic residues. b Extracellular view of the zGPR4 showing the titratable H/D/E residues at the ECLs. Some key interacting residues are also shown. a, b The ECL2 is colored gray for clarity.