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Overlap of aromatic/H1’ regions of the NOESY spectrum (black cross-peaks) and TOCSY spectrum (red cross-peaks) of the proposed benzyl zipper duplex in (0.7 mM duplex in 130 mM NaCl, 20 mM Na-Phos, 1 mM EDTA, pH 7, 40°C). The blue line traces the assignments of C17 to A23.
