Green Fluorescent Protein

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In the mid-1970s, the Green Fluorescent Protein (GFP) was revealed.  This protein is linked to the pGlo gene, which can be found in the jellyfish (Aequoria Victoria) at the right.  As one can see, the fluorescence is highly visible in the jellyfish.  The GFP is able to fluoresce in the presence of ultraviolet radiation.  The actual protein is 238 amino acids in length.
The fluorescence expression of GFP has been found in bacteria, yeast, slime mold, plants, bacteria, drosophila, zebrafish, and in mammalian cells.  This fluorescence has the ability to work as a protein tag for its ability endure the fusion of N- and C-terminal to various proteins. 
 

Photo reproduced. (www.npaci.edu)

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