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2D heteronuclear 31P–1H Correlation Spectroscopy (COSY) of Tel26 in K+ solution with peak assignments. The (n)P–(n − 1)H3′ peaks are labeled as ‘residue name (n)/residue name (n − 1),’ while the (n)P–(n)H4′ or (n)P–(n)H5′,′′ peaks are labeled as ‘residue name/H4′’ or ‘residue name/H5′,′′’, respectively. The spectra were referenced to external H3PO4. Conditions: 25°C, 25 mM K-phosphate, 70 mM KCl, pH 7.0, 2.5 mM DNA.
