Mal-PEG4-Val-Cit-PAB-OH is a high-purity cleavable PEG linker with a maleimide for thiol coupling, a Val-Cit-PAB spacer for cathepsin B–mediated release, and a PEG4 spacer specifically for solubility and flexibility.
Polyethylene Glycol PEG Linkers > Peptide Linkers > Val-Cit Linker
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