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(A) Gel electrophoresis analysis showing the complexation of siRNA by the polythiophenes under study. (B) MDA-MB-231 were incubated with PTH2/siRNA and PTH3/siRNA during the allocated 24 h. The cells were illuminated during 5 min using standard fluorescent microscope with a mercury lamp at 450 nm, magnification x4. Two days after illumination, cells were submitted to an MTT assay to quantify living cells.
