MLT-985（Cat No.:I045208）is a potent, selective inhibitor of casein kinase 1 delta and epsilon (CK1δ/ε), serine/threonine kinases involved in regulating circadian rhythm, Wnt signaling, and cell cycle progression. By blocking CK1δ/ε activity, MLT-985 modulates phosphorylation of key substrates, impacting processes such as sleep–wake regulation, tumor growth, and neurodegeneration. It is a valuable research tool for investigating CK1-mediated signaling pathways in health and disease. MLT-985 holds therapeutic potential for circadian rhythm disorders, certain cancers, and neurodegenerative conditions where CK1δ/ε dysregulation contributes to disease progression and pathophysiology.