SPDP-PEG-CH2CO2H, MW 1,000 is a pyridyl disulfide modified polyPEG which can react with thiol moiety to produce a new disulfide bond and generating unreactive pyridine-2-thione as a by product. Reaction between carboxyl and amine can be done in the presence of activating agent, such as HATU/EDC, to generate amide linkage. Reagent grade, for research purpose.
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