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Structure of unnatural base pairs viewed along helix axis (left, with sugar hydrogens omitted for clarity) or from the major groove (right). a) The NMR structure of the dMMO2-d5SICS base pair, and b – d) the models generated from the parental base pair for dDMO-d5SICS, dTMO-d5SICS, and dFMO-d5SICS, respectively. A color version is provided in Supporting Information.
