4HBC:
reference: Crystal structure of a conformation-dependent rabbit IgG Fab specific for amyloid prefibrillar oligomers., Arai H, Glabe C, Luecke H, Biochim Biophys Acta. 2012 Dec;1820(12):1908-14. doi:, 10.1016/j.bbagen.2012.08.016. Epub 2012 Aug 24. PMID: 22940003

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