Description
4-arm PEG succinimidyl glutarate ester (4-arm PEG-SG) is a multiarm PEG derivative with succinimidyl NHS active ester groups at each terminal of the 4 arms connected to onepentaerythritol core. PEG-SS (succinimidyl glutarate ester) is one type of PEG-NHS reagents. There is a C3 hydrocarbon ester linkage between PEG and the NHS ester. NHS is a good leaving group which can react with amine-containing moities.
