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Lipoplex size after primary drying and secondary drying in the presence of surfactant. Lipoplexes are formulated at 1 μg/ml DNA in sucrose and varying concentrations of Tween 80. A) sucrose/DNA weight ratio = 500; B) sucrose/DNA weight ratio = 2000. Each symbol and error bar represents the mean ± one standard error of at least triplicate samples. Asterisks indicate particle sizes that were not significantly different from fresh samples.
