a delay in cell cycle progression and a decrease in sister chromatid exchange ( sce ) frequency was observed in bloom syndrome ( bs ) cells when exposed to polyethylene glycol ( peg ) treatment followed by co-cultivation with unexposed normal cells , whereas the sce rate of both normal and bs cells increased when peg-exposed normal cells were co-cultured with unexposed bs high sce cells .
C1516334
cell cycle progression
C0007634
cells