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Nucleic Acids Research, 1975, Vol. 2, No. 12 2269-2278
© 1975

Articles

Mechanism of the mutagenic action of hydroxylamine. IX. The UV-induced cleavage of the N-O bond in N4-hydroxy-and N4-methoxycytidine and N6-methoxyadenosine

N.A. Simukova, D. Yu. Yakovlev and E.I. Budowsky*

Shemyakin Institute of Bioorganic Chemistry, USSR Academy of Sciences Moscow, 117312, USSP

*Correspondence should be sent to Prof. Edward I.Budowsky

Received October 20, 1975. The principal UV-induced ({lambda} = 254 nm) reaction of N4 - hydroxy- and N4 methoxycytidines and N6 -methoxyadenosine in neutral aqueous solutions is cleavage of the exocyclic N-O bond with the respective formation of citidine and adenosine. Quantum yields are 2.8x10–3 and 2.2x10–3 M/E for the first two compounds and 9.1x10–3 M/E for N6-methoxyadenosine.


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