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Laser Charts Green Protein

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BERKELEY, Calif., Nov. 12, 2009 – Green fluorescent proteins (GFP) have replaced many dyes in biological studies because they are non-toxic and, when attached to a gene and inserted into an organism, serve as a bright, glowing confirmation that the gene has hit its target. Obtained originally from a bioluminescent Pacific Ocean jellyfish, the protein has been mutated and engineered to absorb and emit various colors. Now, chemists at the University of California, Berkeley, have discovered the secret to the structural changes the GFP undergoes when it fluoresces. The UC Berkeley chemists used extremely short laser...Read full article

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    Published: November 2009
    Glossary
    nano
    An SI prefix meaning one billionth (10-9). Nano can also be used to indicate the study of atoms, molecules and other structures and particles on the nanometer scale. Nano-optics (also referred to as nanophotonics), for example, is the study of how light and light-matter interactions behave on the nanometer scale. See nanophotonics.
    photonics
    The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
    raman spectroscopy
    Raman spectroscopy is a technique used in analytical chemistry and physics to study vibrational, rotational, and other low-frequency modes in a system. Named after the Indian physicist Sir C.V. Raman who discovered the phenomenon in 1928, Raman spectroscopy provides information about molecular vibrations by measuring the inelastic scattering of monochromatic light. Here is a breakdown of the process: Incident light: A monochromatic (single wavelength) light, usually from a laser, is...
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