Acid-PEG5-mono-methyl ester functions as a PEG linker with a methyl ester that can be hydrolyzed under strong basic conditions and a carboxylic terminal that can react with primary amine groups in the presence of activators (e.g. EDC or HATU). Water solubility is elevated via the PEG5 linker. Reagent grade, for research purpose.
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