Effect of fes siRNA on phosphorylation of STAT proteins and p70 S6 kinase. TF-1 KIT^D816V cells treated with either control or fes siRNAs were serum-starved for 16 hours. SCLs were immunoblotted with indicated anti-phospho antibodies and after stripping, reprobed with specific antisera. Similar results were obtained in 3 independent experiments.