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AbstractIt has been hypothesised that proton Ray Ban Outlet tunnelling between paired nucleobases significantly enhances the formation of rare tautomeric forms and hence leads to errors in DNA replication. Here, we study nuclear quantum effects (NQEs) using deuterium isotope induced changes of nitrogen NMR chemical shifts in a model base pair consisting of two tautomers of isocytosine, which form hydrogen bonded dimers in the same way as the MK Outlet guanine cytosine base pair. Isotope effects in NMR are consequences of Cheap Nike Air Force 1 NQEs, because ro Nike Air Force 1 Cheap Outlet vibrational averaging of different isotopologues gives rise to different magnetic shielding of the nuclei.; 11:55 PM