3GWH:
reference: Crystallographic ab initio protein structure solution below atomic resolution., Rodriguez DD, Grosse C, Himmel S, Gonzalez C, de Ilarduya IM, Becker S, Sheldrick GM, Uson I, Nat Methods. 2009 Sep;6(9):651-3. Epub 2009 Aug 16. PMID: 19684596

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