OPSS-PEG-SVA, MW 3.4K is a linear bifunctional modified PEG, N-hydroxysuccinimide (NHS) active ester can react with the amine group of lysine under mild reaction conditions to form a physiologically stable the amide bond.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.