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Silylating agents. (A) 3-Aminopropyl-triethoxysilane (APTES). (B) 3-Azidopropyltriethoxysilane, used to covalently attach peptides via their C-termini, and passivating agents (C–F). (C) n-Propyltrimethoxysilane (n-propyl). (D) Hexyltrimethoxysilane (hexyl). (E) t-Butyltri-methoxysilane (t-butyl). (F) Methoxytri-ethyleneoxypropyl-trimethoxysilane (PEG-3).
