Fig. 1From: Inducible T-cell co-stimulators regulate the proliferation and invasion of human hepatocellular carcinoma HepG2 cellsDetection results of siRNA transfection rate (×100). a Negative transfection control observed under the fluorescence microscope. b Positive transfection observed under the fluorescence microscope; c, d Negative transfection control observations under the bright field and fluorescence microscope with the same visual fieldBack to article page