4WNN:
reference: FACT Disrupts Nucleosome Structure by Binding H2A-H2B with Conserved Peptide Motifs., Kemble DJ, McCullough LL, Whitby FG, Formosa T, Hill CP, Mol Cell. 2015 Oct 15;60(2):294-306. doi: 10.1016/j.molcel.2015.09.008. Epub 2015, Oct 8. PMID: 26455391

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