Azido-PEG4-CH2CO2-NHS linker contains azide and NHS ester moieties. The PEG spacer increases the aqueous solubility of the resulting compound. The azide group readily reacts with alkyne, BCN, DBCO through Click Chemistry to yield a stable triazole linkage. The NHS ester is widely used to label the primary amines (-NH2) of biomolecules such as proteins, oligonucleotides, and etc.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.