Fig. 4

Western-blot analysis—a left side: cell line DU145—EGFR-protein bands after radiation + cetuximab (± EGF), right side: cell line A431-EGFR protein bands after cetuximab (± EGF), b phosphoEGFR-protein bands, c p44/p42 Erk1/Erk2-protein bands, d Actin, RT = radiation; Note: the table below the respective photo is the associated abstract drawing of the corresponding protein bands