2BYK:
reference: The histone fold subunits of Drosophila CHRAC facilitate nucleosome sliding through dynamic DNA interactions., Hartlepp KF, Fernandez-Tornero C, Eberharter A, Grune T, Muller CW, Becker PB, Mol Cell Biol. 2005 Nov;25(22):9886-96. PMID: 16260604

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