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KL044, a stabilizer of the clock protein cryptochrome (CRY) , is a potent chemical probe with a pEC50 value of 7.32, leading to the extension of the circadian period and repression of Per2 activity[1].

KL044, a stabilizer of the clock protein cryptochrome (CRY) , is a potent chemical probe with a pEC50 value of 7.32, leading to the extension of the circadian period and repression of Per2 activity[1]. KL044 (0-3.7 μM; 8 h) effectively stabilizes the CRY1-LUC fusion protein without affecting the stability of LUC in the HEK293 stable cell line[1].

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[1]. Jae Wook Lee, et al. Development of Small-Molecule Cryptochrome Stabilizer Derivatives as Modulators of the Circadian Clock. ChemMedChem. 2015 Sep;10(9):1489-97.