Mal-PEG1-bromideomide contains a maleimide group and bromide group. The maleimide group reacts specifically with a thiol group to form a covalent C-S bond, enabling the bioconjugation with a thiol bearing molecules. Bromo (Br) is a very good leaving group for nucleophilic substitution reactions.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.