Figure 6. Overexpression of Flag-nexilin inhibits localized PI3K activation in L6 Cells.

A) L6 myoblasts were transfected with Flag-nexilin or vector alone together with GRP1-PH-GFP cDNA. Following starvation, cells were stimulated with 100 nM insulin and then fixed, permeabilized and probed with anti-Flag antibodies followed by Cy3-conjugated donkey anti-mouse secondary abs (red). Cells were visualized for the presence of PIP3 accumulation in cell membranes using GRP1-PH-GFP. B) L6 cells were transfected with GRP1-PH-GFP and pretreated with Ly294002 (50 nM) prior to insulin stimulation and probed with anti-pAKT abs as in Figure 2. C) L6 myoblasts transfected with Flag-nexilin or vector alone were treated with 100 nM insulin for the indicated times and then probed with anti-Flag abs and Cy5-conjugated secondary abs (green) and rhodamine-phalloidin (red).