Abstract
A tetrapeptide, l-histidyl-glycyl-glycyl-l-histidine (HGGH), was synthesized and the pUC19 plasmid DNA cleaving activity by copper(II) complex of HGGH (Cu(II)−HGGH) was investigated. Cu(II)−HGGH showed bleomycin-like DNA cleaving activity and, at 50nM, converted a supercoiled DNA efficiently to a linear DNA in the presence of 500μM H2O2/sodium ascorbate through an oxidative pathway.
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