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Behind a marine creature's bright green fluorescent glow
Date:7/1/2014

0 percent efficiency (current engineered GFPstraditionally rooted in the Cnidarian phylumonly reach 60 to 80 percent efficiency), which combines with other properties of light absorbance to make the amphioxus GFPs about five times brighter than current commercially available GFPs, resulting in effect to a huge difference," said Deheyn. "It is also interesting that the same animal will also express similar GFPs with an efficiency of about 1,000 times less."

The exact mechanism that controls this ability of perfect efficiency during light transformation from blue to green remains unknown, Deheyn said, but this study opens doors towards its understanding.

"The most unique part of this discovery perhaps lays in the fact that for the first time, we show that different GFPs seem to have different functions within the same individual and unrelated to their ability to produce light, thus probably involving a biochemical role as well," said Deheyn. "Nevertheless, having bright GFPs or the tool to increase brightness in current ones is critical for optimizing applications of fluorescence."

Amphioxus are thought to use fluorescence for photo-protection (thus acting as sunscreen), as an antioxidant, and possibly for photo-sensing (using GFPs as receptors to the surrounding light) in their environment. Deheyn says learning more about bright-emitting GFPs in nature is useful for a variety of applications and fields of science.

"The U.S. Air Force, and the Department of Defense in general, uses a large variety of biosensors in biomedicine, bioengineering, and materials science, and providing proteins with the ability to be very bright can help technology advance because of better signal-to-noise ratio."


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Contact: Mario Aguilera or Robert Monroe
scrippsnews@ucsd.edu
858-534-3624
University of California - San Diego
Source:Eurekalert

Page: 1 2

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