Fmoc-Gly-Gly-Phe-Gly-OH is a self-assembly of N- and C-protected tetrapeptide containing an Fmoc-protected amino group. The Fmoc group can be deprotected under basic condition to obtain the free amine which can be used for further conjugations. The compound is a protease cleavable linker used for antibody-drug conjugates (ADCs).
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