16-(Bromoacetamido-PEG6-ethylcarbamoyl)pentadecanoic-t-butyl ester is a PEG linker featuring a bromoacetamide and a terminal t-butyl ester. Bromoacetamide is a thiol-specific covalent ligand which can be used in labeling proteins via their cysteine residues, while the t-butyl ester can be hydrolyzed to reveal a carboxylic acid that can be used to couple with amines or alcohols.
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