Figure 2

Distribution of fragmented extracellular human DNA over interchromosomal fractions of MCF-7 cell culture depending on the time it was present in the culture medium (electrophoresis under denaturing conditions, logarithmic stage of cell culture growth). Agarose block stained with ethidium bromide are shown rightward; X-ray patterns of the same block after drying, leftward. Numbers above the block indicate the time of cell culture incubation with α³²P-labeled extracellular DNA and α-dATP*; numbers to the right of the blocks, markers of molecular weight (Kb); α, initial α-dATP* precursor; III, number of experiment. Arrow denotes polymeric DNA form, retaining its size under denaturing conditions.