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The role of the genomic bipyrimidine nucleotide frequency in pyrimidine dimer formation caused by germicidal UV radiation was studied in three microbial reference organisms (Escherichia coli K12, Deinococcus radiodurans R1, spores and cells of Bacillus subtilis 168). The sensitive HPLC tandem mass spectrometry assay was used to identify and quantify the different bipyrimidine photoproducts induced...
Vegetative wild-type and DNA repair-deficient (homologous recombination, recA and nucleotide excision repair, uvrB) Bacillus subtilis cells were exposed to UV-C radiation. Colony formation, DNA bipyrimidine photoproducts and gene expression were measured during cell recovery. Gene expression was measured after 60 min cell recovery where 50% (wild-type), 30% (recA) and 8% (uvrB), respectively, of the...
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