Abstract
We have prepared water-insoluble and nuclease resistant DNA-matrixes by UV irradiation. The UV-irradiated DNA-matrix could effectively accumulate and condense harmful DNA-intercalating compounds, such as acridine orange (AO) and ethidium bromide (EB), from diluted aqueous solutions. The binding constant of AO and EB for UV-irradiated DNA were determined to be 1.0 (+/- 0.2) x 10(5) M-1 and 6.8 (+/- 0.3) x 10(4) M-1, respectively; values consisted with reported results for non-irradiated DNA. In addition, the agarose gel electrophoresis and AFM measurements indicate that DNA matrix forms an intermolecular cross-linking structure with the radical reaction. The UV-irradiated DNA-matrixes have potential uses as a biomaterial filter for the removal of harmful DNA intercalating compounds.
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