Mal-PEG5-NHS ester linker contains a maleimide group and an NHS ester group. The PEG spacer increases the aqueous solubility of the resulting compound. The NHS ester can be used to conjugate with amine containing proteins, oligonucleotides, and other molecules. The maleimide group reacts specifically with a thiol group to form a covalent C-S bond, enabling the bioconjugation with a thiol bearing molecules.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.