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On-chip transfection and EGFP induction in NIH 3T3 cells. The plasmid vector which encodes EGFP driven by a Cox-2 promoter was transfected with NIH 3T3 cells. (a) Bright field and (b) fluorescence images of NIH 3T3 cells stimulated with TPA for 7 h. (c) Bright field and (d) fluorescence images of NIH 3T3 cells without stimulation
