H2N-PEG-SH (MW 2000)

H2N-PEG-SH (MW 2000) is a linear heterobifunctional polyethylene glycol derivative containing thiol and amine groups. It serves as a significant cross-linking or bioconjugation reagent with a PEG chain. The thiol (?SH) or mercapto group selectively reacts with maleimide, OPSS, vinyl sulfone, and transition metal surfaces (such as gold and silver) .