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 __   _    _    _                ___      ______  
| || | || | || | ||   ____      / _ \\   /_   _// 
| '--' || | || | ||  |    \\   / //\ \\    | ||   
| .--. || | \\_/ ||  | [] ||  |  ___  ||  _| ||   
|_|| |_||  \____//   |  __//  |_||  |_|| /__//    
`-`  `-`    `---`    |_|`-`   `-`   `-`  `--`     
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Text this: Site-specific phosphorylation of casein kinase 1δ(CK1δ) regulates its activity towards the circadian regulator PER2