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Effect of exposure of E. coli cultures to honey or exogenous hydrogen peroxide on the integrity of bacterial DNA. The cells were treated with honeys (manuka, buckwheat honeys H203, H204, and H205) or with increasing concentrations of exogenous H2O2 (5–0.312 mM). Untreated cells and cells treated with the sugar solution (artificial honey, AH) served as the controls. The integrity of DNA was analyzed on agarose gels.
