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Expression of truncated EF1α promoter. (a) Structure of the plasmids expressing GFP under truncated EF1α promoter. The original EF1α promoter is 2.1-kb long. The 5′-end of 16EF was the PpuMI site and that of 14EF was the BlpI site. (b) Images obtained using fluorescent microscopy. (c) Fluorescence measured using a fluoroscan plate reader. Vertical axis showed florescence in arbitrary unit; n = 4.
