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. 2003 Aug 1;31(15):4326–4331. doi: 10.1093/nar/gkg654

Figure 2.

Figure 2

750 MHz 2D HNN COSY experiment to detect trans-hydrogen bond scalar couplings. The spectra were acquired at pH 6.8, 25°C, 1 mM RNA and 50 mM NaCl. Correlations are observed between the H1 of guanosine and the N3 of cytidine, and between the H3 of uridine and the N1 of adenosine for all Watson–Crick base pairs.