this indicates that one round of dna replication was sufficient for mispairing of methylated bases in the dna with the c and t provided by the deoxyribonucleosides , and that 4-6 doublings prior to mutant selection with ag were necessary to deplete pre-existing hypoxanthine : guanine phosphoribosyl transferase in newly mutated cells .
C0598312
dna replication
C0012854
dna