1XB9:
reference: The Structure and Function of Xenopus NO38-Core, a Histone Chaperone in the Nucleolus., Namboodiri VM, Akey IV, Schmidt-Zachmann MS, Head JF, Akey CW, Structure (Camb) 2004 Dec;12(12):2149-60. PMID: 15576029

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