FIGURE 4.
Ion-induced folding of the junctions studied by the change in FRET efficiency as a function of Mg2+ concentration for particular vectors. (A) 4H junction: BC (open circle); SB (closed circle). (B) IRES junction: BA (closed circle); CS (open circle); BS (closed triangle); AC (open triangle); AS (closed square); BC (open square). The data have been fitted to two-state models (lines), from which [Mg]1/2 and Hill coefficients (n) have been calculated and given in Table 1.
