6QS5:
reference: Inhibition of Protein Kinase CK2 by Flavonoids and Tyrphostins. A Structural Insight., Lolli G, Cozza G, Mazzorana M, Tibaldi E, Cesaro L, Donella-Deana A, Meggio F, Venerando A, Franchin C, Sarno S, Battistutta R, Pinna LA, Biochemistry. 2012 Jul 25. PMID: 22794353

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