3JUH: Crystal Structure Of A Mutant Of Human Protein Kinase Ck2alp Altered Cosubstrate Specificity
reference: Inclining the purine base binding plane in protein kinase CK2 by exchanging the flanking side-chains generates a preference for ATP as a cosubstrate., Yde CW, Ermakova I, Issinger OG, Niefind K, J Mol Biol. 2005 Mar 25;347(2):399-414. Epub 2005 Jan 18. PMID: 15740749

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