FIGURE 7.

Rates of translocation events versus frameshifting efficiencies. The rates of (A) reverse 30S head rotation and (B) mRNA quenching are roughly correlated inversely with frameshifting efficiencies. The outlier in (B) Q507D, whose rate of reverse head rotation is unusually slow compared to its rate of mRNA quenching (Table 1), suggests that reverse head rotation is more closely correlated with frameshifting than intersubunit rotation or mRNA quenching. Error bars indicate standard errors of the mean.