Azido-PEG24-NHS ester is a PEG derivative containing an azide group and an NHS group. The azide group enables Click Chemistry. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules. The hydrophilic PEG spacer adds to the water solubility of this reagent. https://www.cd-bioparticle...