Amine-PEG-amine (NH2-PEG-NH2), MW 20K is a homofunctional PEGylation reagent with two terminal amines. These amine peg amine are readily soluble in water and all PEGylation reactions can be performed in aqueous buffers.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.