the effects of 5-azacytidine ( 5-aza-c ) , alone and in combination with mitomycin c , were measured on sister-chromatid exchange ( sce ) formation and dna methylation in different genomic regions of chinese hamster ovary cells and in chinese hamster cells containing amplified , dihydrofolate reductase sequences and resistant to methotrexate .
C0037211
sister-chromatid exchange
C0007634
cells