the induced sce frequencies plotted as a function of surviving fraction were relatively lower in xp-a and -d cells than those in normal cells , though in xp-c , -e , and -variant cells they were almost the same as those in normal cells , suggesting that , in xp-a and -d groups , uv damage is more lethal than producing sce in surviving cells .
C0007634
normal cells
C0037211
sce