APN-oxyamine, HCl salt is a heterobifunctional linker that combines an APN moiety with exquisite chemoselectivity for cysteine and an oxyamine group for efficient oxime ligation. Its highly stable APN–cysteine conjugates endure aqueous media, human plasma, and live-cell conditions, making it a powerful thiol-click chemistry tool for bioconjugation, protein engineering, and therapeutic development.
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