mPEG-Succinimidyl Propionate (mPEG-SPA), MW 20K, is an amine-reactive NHS PEG product that reacts with primary amine groups under basic conditions. mPEG-SPA is the key PEG material for PEGylated drugs, used in PEG-uricase, Puricase, Pegloticase and their biosimilars.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.