نتایج جستجو برای: photoreactivation
تعداد نتایج: 311 فیلتر نتایج به سال:
We have employed conjugal transfer of an F’ lac episome to examine targeted and untargeted mutagenesis in the lacl gene of Escherichia coli and to determine the relative importance of pyrimidine dimers as premutational UV lesions compared to (6-4) photoproducts that also may have a mutational role. This conjugal system allowed us to assess the premutagenic role of UV lesions independently from ...
BACKGROUND Sequenced archaeal genomes contain a variety of bacterial and eukaryotic DNA repair gene homologs, but relatively little is known about how these microorganisms actually perform DNA repair. At least some archaea, including the extreme halophile Halobacterium sp. NRC-1, are able to repair ultraviolet light (UV) induced DNA damage in the absence of light-dependent photoreactivation but...
Bacteriophage particles are called active when they are able to give rise to production of active phage following adsorption on their specific host bacterium. This is generally detected by the formation of a plaque when plated on nutrient agar by standard techniques (Adams, 1950). If the particles are exposed to ultraviolet light, a fraction of them loses the ability to give rise to production ...
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