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Background: MKK7 is a kinase involved in the cellular stress response. Results: MKK7 regulates circadian gene expression and the stability of an essential circadian component in unstressed mammalian cells. Conclusion: MKK7 functions as a circadian clock regulator. Significance: Our identification of role of MKK7 in the circadian clock provides insight into the importance of stress-responsive molecules in the maintenance of cellular homeostasis.

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