2H4E:
reference: Structural basis for the protective role of sulfite against transthyretin amyloid formation., Gales L, Saraiva MJ, Damas AM, Biochim Biophys Acta. 2007 Jan;1774(1):59-64. Epub 2006 Nov 6. PMID: 17175208

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