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Oxidatively damaged thymine, 5-formyluracil (5-fU), was incorporated into a predetermined site of double-stranded shuttle vectors. The nucleotide sequences in which the modified base was incorporated were 5'-CFTAAG-3' and 5'-CTFAAG-3' (F represents 5-fU), the recognition site for the restriction enzyme AflII (5'-CTTAAG-3'). The 5-fU was incorporated into a template strand of either the leading or...
5-Formyluracil (5-foU) is a major oxidation product of thymine formed in yields comparable to that of 8-oxoguanine in DNA by ionizing radiation. Whereas the mutagenic effects of 8-oxoguanine are well understood, the investigation of the biological implications of 5-foU has so far been limited. Here we demonstrate that 5-formyl-2'-deoxyuridine (5-fodUrd) supplied to the growth medium of Escherichia...
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