6-Azidohexanoic Acid Sulfo-NHS Ester is a water-soluble compound ideal for easily and efficiently tagging antibodies and proteins with an azido group in aqueous solutions. It reacts with primary amines at pH 7-9 to form stable amide bonds. This reagent is preferred for projects that can’t use organic co-solvents and is often used to specifically label cell surface proteins.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.