N-(Azido-PEG4)-N-bis(PEG4-NHS ester) is a branched chemistry linker with two NHS ester groups and a terminal azide. The NHS ester is used to label the primary amines (-NH2) of proteins and other amine-attached molecules. PEG arm allows for enhanced hydrophilic properties. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
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