4arm-PEG-SC (4arm-PEG-Succinimidyl Carbonate), MW 20K is a high-quality multi-arm PEG derivative with succinimidyl esters at each end of the four arms, which can rapidly react with primary amines. reaction.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.