1M2P:
reference: Inhibition of protein kinase CK2 by anthraquinone-related compounds. A structural insight., De Moliner E, Moro S, Sarno S, Zagotto G, Zanotti G, Pinna LA, Battistutta R, J Biol Chem 2003 Jan 17;278(3):1831-6. PMID: 12419810

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