Amino-PEG-CH2CO2-t-butyl ester, MW 2,000 is a heterobifunctional PEG derivative with terminal amine and carboxylate tert-butyl ester group. The terminal amine is reactive with an activated NHS ester in physiological condition. The t-butyl ester group can be hydrolyzed under acidic/basic condition to yield a free carboxylic acid. Reagent grade, for research purpose.
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