Figure 4. Effects of PTEN Expression on Akt, Ask-1 and p70S6K Phosphorylation.
Cells were collected after trypsinization and plated in RPMI 1640 containing 10% FBS. After allowing the cells to adhere for 24 hrs, the monolayers were washed twice with PBS and then phenol red free RPMI 1640 containing 0.5% CS FBS was added for 24 hrs. Cells were then stimulated with 10% FBS for the indicated time periods. Protein lysates were prepared and subjected to western blot analysis.