Figure 5.
Irreversible EGFR inhibitors inhibit autophosphorylation of overexpressed Bmx in LNCaP cells, whereas reversible inhibitors show no effect. (a) Immunoprecipitated Flag-Bmx was pre-incubated with different drugs at 4°C for 2 hrs, and in vitro kinase assay using 32P-ATP was performed. (b) In vitro kinase assay using Flag-Bmx immunopurified from the cells that were pre-treated with drugs for 4 hrs. Autophosphorylation was examined by using both radiography and phosphotyrosine immunoblot analysis.