m-PEG-Iodoacetamido, MW 5,000 is a PEG linker featuring a methoxy cap and an iodoacetamide group. Iodoacetamide is a covalent ligand used in binding thiols such as those featured in the amino acid cysteine. The methoxy cap is fairly inert, allowing conjugation to selectively occur at the iodoacecetamide.
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