t-Boc-N-amido-PEG5-NHS ester linker contains NHS ester and Boc-protected amine moieties. The PEG spacer increases the aqueous solubility of the resulting compound. The Boc group can be deprotected under mild acidic conditions to form a free amine. The NHS ester can be used to label amine containg biomolecules.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.