Description_x000D_ Packaging_x000D_ 10, 50 mg in glass bottle_x000D_ Biochem/physiol Actions_x000D_ CRT0044876 targets the apurinic endonuclease (APE1) active site and inhibits its 3′-phosphodiesterase and 3′-phosphatase activities—essential steps in excision repair—with minimal effects on endonuclease IV, BamH1 restriction endonuclease, or topoisomerase I even at concentrations as high as 100 μM. At non-cytotoxic concentrations, CRT0044876 potentiates the cytotoxicity of several DNA base-targeting compounds, with accumulation of apurinic sites.