HO-PEG-Valeric acid(HO-PEG-VA), MW 3.4K is a linear, water-soluble PEG polymer. Terminal carboxylic acids can react with primary amines under the action of activators to form stable amide bonds.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.