A Ruler of Gold and DNA

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These before-and-after images reveal how the gold nanoparticles change after DNA strands are added the nanoparticles. Chen and colleagues use these shifts in plasmon resonance to measure how proteins bind to DNA.
These before-and-after images reveal how the gold nanoparticles change after DNA strands are added the nanoparticles. Chen and colleagues use these shifts in plasmon resonance to measure how proteins bind to DNA.

Scientists from the U.S. Department Energy’s Lawrence Berkeley National Laboratory and the University of California at Berkeley have developed a ruler made of gold nanoparticles and DNA that can measure the smallest of life’s phenomena, such as precisely where on a DNA strand a protein attaches itself.


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