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Cetuximab resistant model establishment and characterization. (A) EGFR signaling of parental and cetuximab-resistant clones after cetuximab resistant model establishment. (B) Cell viability assay of parental and resistant clone upon cetuximab exposition in 72 h. (C) Cell morphology of parental and resistant cells P: FaDu parental; R: FaDu resistant; C: Clone. The images were acquired in 10× magnification.
