1BL1:
reference: Binding domain of human parathyroid hormone receptor: from conformation to function., Pellegrini M, Bisello A, Rosenblatt M, Chorev M, Mierke DF, Biochemistry 1998 Sep 15;37(37):12737-43. PMID: 9737850

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).