Nature 460, 978–983 (2009)

In Figure 5i of this Article, the GTPase activity data contains a calculation error that occurred during the conversion of 2-amino-6-mercapto-7-methylpurine absorbance to μM phosphate. As a result, the activity is over stated. The corrected Figure 5i with the appropriate y axis is shown below. This change does not affect any of the conclusions of the work.

figure 1