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Effect of membrane impermeant polycation on the uptake of paromomycin. Paromomycin uptake was measured after the pretreatment of the promastigotes in absence (control) or in presence of 0.01 %, poly-(L)-lysine or 0.01% poly-alanine for 15 min. Each point represents the mean ± S.D. of at least triplicate observations. (*) not statistically different from the control group. (**) is statistically different at P< 0.005 when compared to the values obtained for controls.
