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Chemical shift differences between modified and unmodified duplexes. Chemical shift differences were obtained for non-exchangeable protons at 30°C using the unmodified duplexes as the reference as described in the text. Open bars, H8/H6; closed bars, H1′; shaded bars, H2′; horizontal striped bars, H3”. (A) dR10·rMeY10–dR10·rY10. (B) rR10·dY10– rR10·dY(U)10. (C) rR10·dpY10–rR10·dY(U)10.
