Axispharm offers you high purity 2,5-Dioxo-1-pyrrolidinyl 11-azidoundecanoate, a linker containing an azide group and an NHS ester. Azido groups can react with alkynes, BCN, DBCO to form stable triazole bonds by Click Chemistry. NHS esters can be used to label proteins, amine-modified oligonucleotides, and other primary amines (-NH2) containing amine-containing molecules.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.