4JJN:
reference: Heterochromatin protein Sir3 induces contacts between the amino terminus of histone H4 and nucleosomal DNA., Wang F, Li G, Altaf M, Lu C, Currie MA, Johnson A, Moazed D, Proc Natl Acad Sci U S A. 2013 May 6. PMID: 23650358

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