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The nuclear magnetic resonance spectra of N 6 -methoxyadenosine and of uridine, both methylated in the 2'-,3'- and 5'-positions to obtain solution in deuterochloroform, reveal the formation of hetero-associates in which the amino-tautomeric equilibrium is shifted to the amino form. These results ar discussed in terms of the mutagenicity of O-methylhydroxylamine which converts adenosine to...
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