Human Dck C4S-S74E Mutant In Complex With Udp And The Inhibitor 6 {2-[5-(4-{[(4,6-Diaminopyrimidin-2-Yl)Sulfanyl]Methyl}-5-Propyl-1,3-Thiazol-2-Yl)-2-Methoxyphenoxy]Ethanol}