The propargyl group can be reacted with azide-bearing compounds or biomolecules via copper catalyzed azide-alkyne Click Chemistry to yield a stable triazole linkage. The NHS ester can be used to conjugate with amine-bearing biomolecules such as lysine residue on the proteins and amine modified oligonucleotide and biopolymers.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.