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Background and aims Checkpoint kinases 1 and 2 (Chk1 and Chk2) are emerging as key mediators in diverse cellular responses to genotoxic stress, guarding the integrity of the genome. Recent studies suggest the fundamental role of Chk1 and Chk2 in the network of genome surveillance pathways which coordinate cell cycle progression with DNA repair and cell survival or death. Defects in these two serine/threonine...
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