Amine-PEG-CH2OOH, MW 5,000 is a popular bifunctional PEGylation reagent. The amine group is reactive with activated NHS esters. The carboxylic acid can react with primary amines in the presence of activator, such as EDC or HATU, to form a stable amide bond. This PEG polymer is highly water soluble and also soluble in most organice solvents. Reagent grade, for research purpose.
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