1TZY:
reference: High-resolution structure of the native histone octamer., Wood CM, Nicholson JM, Lambert SJ, Chantalat L, Reynolds CD, Baldwin JP, Acta Crystallograph Sect F Struct Biol Cryst Commun. 2005 Jun 1;61(Pt, 6):541-5. Epub 2005 Jun 1. PMID: 16511091

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