Nuclease recognition of an alternating structure in a d(AT)14plasmid insert
- 1 January 1986
- journal article
- Published by Oxford University Press (OUP) in Nucleic Acids Research
- Vol. 14 (9) , 3703-3716
- https://doi.org/10.1093/nar/14.9.3703
Abstract
The nuclease reactivity and specificity of a cloned tract of poly X (dA-dT) X poly(dA-dT) has been explored. Digestion with DNAse I, Mung Bean nuclease, S1 nuclease, DNAse II, and copper (1,10-phenanthroline)2 on a 256 base pair restriction fragment containing d(AT)14A revealed a dinucleotide repeat structure for the alternating sequence. Furthermore, conditions which wind or unwind the linear DNA had little effect on the reactivity of the AT insert. These preferred cleavages offer insights to structural alterations within the DNA helix which differ from A, B, or Z-DNA. Nucleation into flanking sequences by this structural alteration was not observed.Keywords
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