NH-bis(PEG1-acid) is a PEG derivative containing biotin and carboxylic acid moieties. Biotin can be used for protein conjugation and biotin labeling. In the presence of EDC, HATU, and DCC, carboxylic acid groups can undergo sequential amide coupling reactions with amine-containing biomolecules to form stable amide bonds.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.