H2N-PEG-SH (MW 3400) is a linear heterobifunctional polyethylene glycol derivative containing thiol and amine groups. It serves as an important crosslinking or bioconjugation reagent with a PEG chain. The thiol or ?SH group selectively reacts with maleimide, OPSS, vinylsulfone, and transition metal surfaces such as gold and silver.
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