Bromoacetamide-m-PEG2 is widely used for thiol labelling and thiol capping reagent. It undergoes a fast nucleophilic substitution reaction with thiol. mPEG modification increase the aqueous solubility of the resulting complex.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.