m-PEG-Succinimidyl Valerate(m-PEG-SVA), MW 10K is a PEGylation reagent containing reactive NHS ester groups. Primary amines react with NHS esters via nucleophilic attack, and NHS is released as a by-product.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.