Mal-PEG4-Propargyl crosslinker is useful to conjugate with biomolecules bearing azide functional groups or thiol functional groups. The maleimide can undergo 1,4-addition with thiol while 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.
Axispharm offers 3000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.