A. Proposed secondary structure of the (mt)pre-nad6 t-element14:6 used in our in vitro assays. B. Percentage of the (mt)pre-nad6 t-element14:6 cleaved as a function of time under single turnover conditions (50 nM 5′ fluorescein end labeled (mt)pre-nad6 t-element14:6, 5 μM PRORP2, 25°C, 30 mM MOPS pH 7.8, 150 mM NaCl, 1 mM DTT and 1 mM MgCl2).