Fig. 3. Structural comparison of active GHRHR with other class B GRCRs in active, intermediate, and inactive states.
a–c Comparison of active GHRHR with inactive (a), agonist-bound intermediate (b), and both agonist- and G-protein-bound active (c) class B GPCRs. d, e Comparison of ligand conformations in G-protein-bound class B GPCRs; close-up view of the N-terminus (d), middle region (e), and C-terminus (e) of bound peptides in class B GPCRs.