Description_x000D_ Packaging_x000D_ 5, 25 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ NSC109555 is a selective inhibitor of Chk2 (IC50 = 310 nM). The compound is reversible and competitive for ATP, and displays little or no activity against other related kinases, including Chk1, at concentrations up to 10 μM._x000D_ Features and Benefits_x000D_ This compound is featured on the Csk page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.