F. AiryScan images of HeLa cells at steady state or exposed to SA for the indicated times. A Rab1-GTP specific antibody was used to monitor the pool of active Rab1, and GM130 to stain the Golgi complex. Insets, eIF3. Scale bar, 10 µm. The graph shows quantification of Rab1-GTP at the Golgi complex expressed as a percentage of the control. Mean ± s.e.m. of three independent experiments. *p<0.011, **p<0.002, Student's unpaired two-tailed t-test. 