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- W4297930488 abstract "The conformation of the ribose of Guo-2′-P (guanosine 2′-phosphate) in aqueous solution was studied by proton magnetic resonance (PMR) at 60 and 250 MHz. The chemical shifts and the spin coupling constants JH-H′ and JP-H2′ are reported as a function of concentration, temperature and p2H. The results show that the conformations of Guo-2′-P are independent of concentration and temperature. The coupling constants JH-H′ suggest that the ribose is not rigid and that its mean conformation changes with the protonation of the base at N7. There is no effect of protonation of the phosphate group on the sugar conformation. At low p2H values H3′ is statistically more axial than H2′, while the situation is inverse in neutral medium. This confirms previous results obtained by nuclear Overhauser effect on guanosine phosphates. The electronic environment of the exocyclic CH2OH group is independent of p2H. The population of the three possible rotamer forms of this group has been evaluated and the results indicate that the gauche-gauche conformation is preponderant." @default.
- W4297930488 created "2022-10-01" @default.
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- W4297930488 date "1972-10-01" @default.
- W4297930488 modified "2023-10-18" @default.
- W4297930488 title "Nucleoside conformations" @default.
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- W4297930488 doi "https://doi.org/10.1016/0005-2787(72)90441-8" @default.
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