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. 2005 Jun 16;33(11):3447–3454. doi: 10.1093/nar/gki626

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© The Author 2005. Published by Oxford University Press. All rights reserved

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Apical region of TAR RNA, showing 29-residue construct used in the present work. The hexanucleotide upper loop of wild-type TAR has been replaced with the stable GAAA tetraloop. Label positions within the RNA are shown as follows: ^2′FU indicates 2′-fluoro-2′-deoxyuridine (at bulge residue U23), and the dot between G26 and A27 denotes a phosphorothioate (pS) linkage.