mPEG-CM (mPEG-Carboxymethyl), MW 5K is a linear monofunctional polyethylene glycol acid reagent. A methylene (CH2) bond exists between the PEG and COOH groups. Carboxyl groups can not only undergo esterification with hydroxyl groups to form ester bonds, but also undergo affinity substitution reactions with amino groups to form amides.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.