Mal-PEG8-Gly-Gly-L-Phe-N-[(carboxymethoxy)methyl]Glycinamide (also knwon as "MC-PEG8-Gly-Gly-Phe-Gly-NH-CH2-O-CH2COOH") is a cleavable ADC linker featuring the GGFG (Gly-Gly-Phe-Gly) sequence and a maleimide group. The maleimide group can react with a thiol group to form a covalent bond. The hydrophilic PEG spacer increases solubility in aqueous media and fine-tunes DMPK.
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