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A fluorescent aptamer (apt-1C-Cy3) was immobilized on different surfaces: i) PEGthiol (mPEG), ii) PEGthiol + streptavidin (mPEG + SA), iii) PEGthiol:BiotinPEGlipo mixture in a 8:2 molar ratio (MIX) or iv) PEGlipo:BiotinPEGlipo mixture in a 8:2 molar ratio + streptavidin (MIX + SA). Three independent experiments have been performed. Five images have been acquired for each sample, reporting data as mean value and standard deviation.
