GFP-18E6 is predominantly located in nuclei. Representative photographs of 293T and MCF-7 cells at 21 h after transfection with GFP and GFP-18E6 expression plasmid. The green fluorescence is emitted by the cells transfected with pGFP and pGFP-18E6 respectively. The red is DAPI stained nuclei. Scale bar = 8 μm. The photographs are examined at 400× magnification by fluorescence microscope.