PEG-bis-SPDP, MW 2,000 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. The newly-formed disulfide bond can be cleaved with a reducing agent such as dithiothreitol (DTT). Reagent grade, for research purpose.
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