Mal-PEG8-Gly-Gly-L-Phe-N-[(carboxymethoxy)methyl]Glycinamide serves as a cleavable (by chymotrypsin) tripeptide linker, composed of a maleimide group to covalently bond with thiol groups, allowing biomolecule attachment, and a terminal carboxylic acid that forms stable amide bonds with primary amine groups using activators (e.g. EDC, or HATU).
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