TCO-PEG4-Val-Cit-PAB-PNP is a cleavable peptide linker. The Val-Cit linker will specifically be cleaved by Cathepsin B. PNP is a good leaving group in nucleophilic reaction. The inverse-electron demand Diels-Alder cycloaddition reaction of TCO with tetrazines is the fastest bioorthogonal reaction with exceptional selectivity. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
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