2F4K:
reference: Sub-microsecond Protein Folding., Kubelka J, Chiu TK, Davies DR, Eaton WA, Hofrichter J, J Mol Biol. 2006 Jun 9;359(3):546-53. Epub 2006 Mar 31. PMID: 16643946

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