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Absolute Mag™ Streptavidin Iron Oxide Nanoparticles, Fluorescent Cy5, PEG-coated, 5 nm (# WNM-X106) are uniform streptavidin functionalized iron oxide nanoparticles with PEG coating and Cy5 labeling. The particles offer great long-term colloidal stability. The streptavidin and dye molecules are both covalently linked to the PEG polymer. These nanoparticles can effectively capture biotinylated molecules such as protein, DNA and peptide, providing important applications in the field of protein labeling, drug delivery and live cell fluorescent imaging. https://www.cd-bioparticles.com/product/absolute-mag-streptavidin-iron-oxide-nanoparticles-fluorescent-item-wnm-x106-1405.html