mPEG9-amine

mPEG9-amine is a PEG-based spacer and synthetic linker building block used to introduce a defined hydrophilic and flexible segment into multistep conjugation designs. The PEG chain can increase molecular spacing and provide a modular connection between reactive groups without serving as a dedicated cleavage trigger. This derivative contains peg9 spacer together with terminal functionality selected for further synthesis. The available reactive group is no dedicated antibody-reactive group unless activated/functionalized; terminal functionality depends on the specific peg derivative. The opposite terminus provides terminal amine; suitable for coupling to activated carboxylates/nhs esters or for further derivatization. Coupling and deprotection conditions should be matched to the terminal groups and the intended order of assembly.