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photoreactivation |
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Because visible light may cause photoreactivation of UV-damaged microorganisms, we stored collected samples in a dark box, blocked from visible light. The observation of photoreactivation many years ago was one of the first indications to biologists that DNA repair mechanisms exist," says coauthor Johann Deisenhofer, a biochemist at the Howard Hughes Medical Institute at Southwestern Medical Center. Synthesizing these impulses from within the medium, Schneider was to invert Levine's formula, turn from the summit to the base of our archives, from derivatives to the root, the negative, not for "reproduction" but for photoreactivation. |
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