Bis-PEG2-NHS ester is a PEG derivative containing two NHS ester groups. The hydrophilic PEG spacer can increase solubility in aqueous media. The NHS ester can be used to label the primary amines (-NH2) of proteins, amine-modified oligonucleotides, and other amine-containing molecules.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.