Fmoc-PEG4-Val-Cit-PAB-PNP represents a cleavable ADC linker featuring a Cathepsin B-sensitive Val-Cit dipeptide for lysosomal payload release, an Fmoc group removable under basic conditions, a PEG8 chain to enhance hydrophilicity, and an amine-reactive PNP, which is a great leaving group. Reagent grade, for research use only.
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