Propargyl-PEG4-sulfonic acid linker contains a propargyl group and a sulfonic acid. The propargyl group readily react with azide-functionalized biomolecules via copper catalyzed Click Chemistry. Sulfonic acid further enhances the aqueous solubility of the resulting PEG functionalized biomolecules.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.