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Ribozyme 51 activity with different lanthanide (III) cations. Ribozyme 51 activity is shown as a function of the radius of the lanthanide (III) ions, with each tested lanthanide labeled. Reactions were conducted at 0.1 mM lanthanide3+, 1 mM cTmp, 50 mM HEPES/KOH pH 7.3, 150 mM NaCl and 2 h reaction time. Error bars represent standard deviations from triplicate experiments, and are smaller than the symbols if not visible.
