3CFT:
reference: Identification of a novel ligand binding motif in the transthyretin channel., Lima LM, Silva VD, Palmieri LD, Oliveira MC, Foguel D, Polikarpov I, Bioorg Med Chem. 2009 Nov 12. PMID: 19954984

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