1F66:
reference: Crystal structure of a nucleosome core particle containing the variant histone H2A.Z., Suto RK, Clarkson MJ, Tremethick DJ, Luger K, Nat Struct Biol 2000 Dec;7(12):1121-4. PMID: 11101893

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