Description_x000D_ Packaging_x000D_ 5, 25 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ CP466722 is a competetive, reversible inhbitor of Ataxia telangiectasia (A-T) mutated (ATM) kinase. The compound CP466722 disrupts ATM-dependent checkpoint cell cylce events, and reverses ATM-dependent substrate phosphorylation and downstream signaling events following exposure to ionizing radiation.