Figure 9
From: RNA interference as a key to knockdown overexpressed cyclooxygenase-2 gene in tumour cells

Efficiency of pSUPER.retro infection system. The images represent four different cell types that underwent the infection by pSUPER.retro system (A: HUVEC; B: HT29; C: HCA7; D: HeLa). Cells were fixed 24 h after infection and observed by using confocal microscopy. Nuclei were stained with propidium iodide and the infected cells appear GFP-positive since the pSUPER.retro vector contains an expressing cassette for GFP gene. Bar: 20 μm.