3NYA:
reference: Conserved binding mode of human beta2 adrenergic receptor inverse agonists and antagonist revealed by X-ray crystallography., Wacker D, Fenalti G, Brown MA, Katritch V, Abagyan R, Cherezov V, Stevens RC, J Am Chem Soc. 2010 Aug 25;132(33):11443-5. PMID: 20669948

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