(2-pyridyldithio)-PEG4-alcohol contains a pyridyl disulfide moiety and an alcohol group. The pyridyl disulfide group can react with thiol groups of proteins over a wide range of pH level. The hydroxyl group allows for further derivatization of the compound. The hydrophilic PEG linker can increase the water solubility of the compound.
Axispharm offers 3000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.