1LFM:
reference: Using deeply trapped intermediates to map the cytochrome c folding landscape., Tezcan FA, Findley WM, Crane BR, Ross SA, Lyubovitsky JG, Gray HB, Winkler JR, Proc Natl Acad Sci U S A 2002 Jun 25;99(13):8626-30. PMID: 12084923

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