when the density-arrested 3y1tsd123 cells were preexposed to 39.8 degrees c for 96 h , they lost the ability to enter s phase at 39.8 degrees c by serum stimulation and required a longer lag time to enter s phase at 33.8 degrees c by serum stimulation than did the cells not preexposed to 39.8 degrees c .
C0080129
s phase
C0007634
cells