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A new glow for electron microscopy - The glowing green molecule known as green fluorescent protein (GFP) has revolutionized molecular biology. When GFP is attached to a particular protein inside a cell, scientists can easily identify and locate it using fluorescence microscopy. However, GFP can't be used with electron microscopy, which offers much higher resolution than fluorescence microscopy. Chemists from MIT have now designed a GFP equivalent for electron microscopy—a tag that allows scientists to label and visualize proteins with unprecedented clarity. http://phys.org/news/2012-10-electron-microscopy.html