Axispharm’s high-purity 3,4-Dibromo-Mal-PEG4-NHS ester is a site-specific maleimide PEG linker containing a dibromomaleimide group. NHS esters react with amine-containing moieties. The dibromomaleimide group allows two substitution points due to the two bromine atoms.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.