2PVR: Crystal Structure Of The Catalytic Subunit Of Protein Kinase Terminal Deletion Mutant 1-335) In Complex With Two Sulfate
reference: Evolved to Be Active: Sulfate Ions Define Substrate Recognition Sites of CK2alpha and Emphasise its Exceptional Role within the CMGC Family of Eukaryotic Protein Kinases., Niefind K, Yde CW, Ermakova I, Issinger OG, J Mol Biol. 2007 Jul 13;370(3):427-438. Epub 2007 May 5. PMID: 17524418

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