Figure 2From: Characterization of cationic lipid DNA transfection complexes differing in susceptability to serum inhibitionCytotoxicity of DOTAP (A) or DC (B) DNA complexes formed at different ratios of lipid to protamine sulfate to DNA. Two days after transfection in the presence of 10% serum the toxicity of the complexes was determined by the MTT assay. Values are expressed as the percent viability of untransfected cells.Back to article page