Biotin-PEG-CH2CO2H, MW 5,000 is a linear polydisperse PEG for biotinylation. The PEG derivative can strongly bind with avidin/streptavidin and used for non-radioactive labeling as well as purification of proteins and other target molecules. The carboxyl (-COOH) can react with an amine (-NH2) in the presence of activating agent (HATU or EDC) to from a stable amide bond. Reagent grade, for research purpose.
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