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Pegylation is the most widely used and accepted methodology for half-life extension of biopharmaceutical drugs that also improves physicochemical and biological characteristics of proteins considerably. Most of the positive pharmacological effects of pegylated proteins are believed to be related to an increased hydrodynamic volume and molecular size. To explore the size impact of polyethylene glycol...
Using fluorescence correlation spectroscopy (FCS), we have established an in vitro assay to study RNA dynamics by analyzing fluorophore binding RNA aptamers at the single molecule level. The RNA aptamer SRB2m, a minimized variant of the initially selected aptamer SRB-2, has a high affinity to the disulfonated triphenylmethane dye sulforhodamine B. A mobility shift of sulforhodamine B after binding...
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