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FIGURE 3. Survival of V79 cells in multicellular clusters as function of initial 131I activity per labeled cell. Data are shown for experiments where 100% (
), 10% (
), or 1% (
) of cells in multicellular cluster were labeled with 131IdU. Clusters were maintained at 10.5°C for 72 h and then survival fraction was determined compared with that of cells from control clusters (0% labeled). Data from 3 independent experiments are plotted for each labeling condition. Least-squares fits of data are shown for each labeling condition.
