Quinoxaline, found in antitumor quinoxaline antibiotics, was found to cleave double stranded DNA at the 5' side guanine of 5'-GG-3' site on irradiation with long wavelength UV light without any additive; furthermore, a bis(quinoxaline-carbohydrate) hybrid system was very effective for DNA cleavage.
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Toshima et al. (2002) studied this question.
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