CM-PEG-CM (Carboxymethyl-PEG-Carboxymethyl), MW 35K is a homobifunctional PEG for amine PEGylation and cross-linking, which is reactive with the amine group of lysine.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.