Interaction of a four-way junction in DNA with T4 endonuclease VII - PubMed (original) (raw)
. 1990 Jun 5;265(16):9285-9.
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- PMID: 2160971
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Interaction of a four-way junction in DNA with T4 endonuclease VII
C A Parsons et al. J Biol Chem. 1990.
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Abstract
The binding of a synthetic four-way junction in DNA by T4 endonuclease VII has been studied using gel retardation and footprint analysis. Two specific protein-DNA complexes have been observed, but only one is stable in the presence of moderate concentrations of salt. The footprint of T4 endonuclease VII in the salt-resistant complex has been probed using hydroxyl radicals generated by the reaction of iron(II)/EDTA with hydrogen peroxide. The hydroxyl radical cleavage pattern indicates protection of approximately 5 residues in two strands that are diametrically opposed across the junction point.
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