inhibition of the gap-filling , polymerizing step of excision repair by 1-beta-d-arabinofuranosylcytosine ( ara-c ) after irradiation with ultraviolet light in human diploid fibroblasts resulted in the formation of persistent dna strand breaks in g1 , g2 , and plateau phase cells , but not in s phase cells .
C0080129
s phase
C0007634
cells