2,3-Dihydro-1H-imidazo[1,2-b]pyrazole (IMPY), a DNA synthesis-inhibitory drug, reversibly arrests growth of human lymphoblasts in vitro. DNA distribution histograms of cultures exposed to 0.5 to 2.0 mM IMPY show accumulation of cells with G1-early S DNA content. On reincubation in fresh medium, cell cycle traverse is resumed by the blocked cells in a… (More)
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