Cytosine methylation enhances Z-DNA formation in vivo.


The influence of cytosine methylation on the supercoil-stabilized B-Z equilibrium in Escherichia coli was analyzed by two independent assays. Both the M.EcoRI inhibition assay and the linking-number assay have been used previously to establish that dC-dG segments of sufficient lengths can exist as left-handed helices in vivo. A series of dC-dG plasmid… (More)


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