1HTP:
reference: The lipoamide arm in the glycine decarboxylase complex is not freely swinging., Cohen-Addad C, Pares S, Sieker L, Neuburger M, Douce R, Nat Struct Biol 1995 Jan;2(1):63-8. PMID: 7719855

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