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[[Image:1ema_JMS_1.gif|thumb|left|350px|Green flourescent protein(1ema)]]

Green fluorescent protein ('''GFP'''), originally isolated from the jellyfish Aequorea victoria (PDB entry [[1ema]]), fluorsceses green (509nm) when exposed to blue light (395nm and 475nm). It is one of the most important proteins used in biological research because it can be used to tag otherwise invisible gene products of interest and thus observe their existence, location and movement.


== Exploring the Structure ==
<Structure load='1ema' size='300' frame='true' align='right' caption='Insert caption here' scene='Insert optional scene name here' />

GFP is a beta barrel protein with 11 beta sheets. It is a 26.9kDa protein made up of 238 amino acids. The chromophore, responsible for the fluorescent properties of the protein, is buried inside the beta barrel as part of the central alpha helix passing through the barrel. The Copy and paste the following line where you want the scene link to appear (scroll down if needed) and edit the TextToBeDisplayed:

<scene name='JMS/sandbox1/Sandbox1/1'>Chromophore</scene> forms via spontaneous cyclization and oxidation of three residues in the central alpha helix: -Thr65 (or Ser65)-Tyr66-Gly67. This cyclization and oxidation creates the chromophore's five-membered ring via a new bond between the threonine and the glycine residues.

<ref>PMID:8703075</ref>
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