t-Boc-N-amido-PEG-CH2COOH, MW 5,000 is a heterofunctional PEG molecule containing carboxyl and amino protected group. In the presence of activator (EDC or HATU), a carboxyl can react with an amine to form an amide bond. The tert-boc can be deprotected under acidic condition. Reagent grade, for research purpose.
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