we found that when s-phase cells are treated with caffeine and hydroxyurea after x irradiation , substantially more potentially lethal damage ( pld ) is expressed , but the addition of cycloheximide , which inhibits pcc induction in s-phase cells , in the presence of caffeine and hydroxyurea reduces the expression of pld to the same level as seen with caffeine alone .
C0080129
pcc
C0007634
cells