FIGURE 8.
Kinetics of variations in RPS6 phosphorylation following AZD-8055 or sucrose addition. Total protein extracts obtained from seedlings were separated by SDS-PAGE and blotted onto a membrane. After incubation with the phospho-specific antibody against RPS6 Ser240 (P-RPS6) blots were revealed by a secondary antibody linked to HRP activity and imaged with a CCD camera. (A) Kinetics of the inhibition of RPS6 Ser240 phosphorylation by AZD 8055. Seven day-old seedlings were either mock (DMSO) or AZD-8055 (2 μM) treated and then harvested at the indicated time. (B) Kinetics of the induction of RPS6 Ser240 phosphorylation by sucrose. Seven day-old seedlings were transferred in sugar-free medium for 24 h and then either mock (0) or sucrose (0.5%) treated. Seedlings were harvested at the indicated time. Bottom panels show Ponceau Red staining of the membranes.