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Two NMR ensembles of an r(UUCG) tetraloop derived from eNOE experiments. (a) Representative (random) conformations sampled from state A corresponding to a canonical fold. (b) Representative (random) conformations sampled from state B corresponding to less structured conformations. Note the fraying out of the guanine of the U•G pair. The PDBids of these NMR ensembles are 6BY4 and 6BY5. Figure adapted from [27].
