Fig. 7. G1 delay is the predominant response to tolerable radiation. Log phase cells were incubated for 3 hours at 450 rad/minute. At 60 minute intervals, cells were collected for plating efficiency (A), OD₆₀₀ measurements (B) or fixed for flow cytometry (C). In (A), 3 µl of 10-fold serial diluted cells were spotted to YPD plates and incubated 48 hours at 30°C.