m-PEG-Mal,MW 1K is a linear PEG polymer containing maleimide groups. Maleimide is reactive with thiol groups between pH 6.5 and 7.5. Hydrophilic PEG chains enhance the water solubility of compounds.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.