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• 4UB7: high-salt structure of protein kinase ck2 catalytic subunit with 4'- carboxy-6,8-bromo-flavonol (flc26) showing an extreme distortion of the atp-binding loop combined with a pi-halogen bond (10.1021/ACSCHEMBIO.5B00235 )
• 4UBA: low-salt structure of protein kinase ck2 catalytic subunit with 4'- carboxy-6,8-bromo-flavonol (flc26) (10.1021/ACSCHEMBIO.5B00235 )