N-(Biotin-PEG4)-N-bis(PEG4-acid) HCl salt is a PEG derivative which contains a biotin and two carboxylic acid moieties. Biotin can be used for the conjugation of proteins and biotin labeling. The carboxylic acid groups can undergo sequential amide coupling reaction with amine-bearing biomolecules in the presence of EDC, HATU and DCC to form stable amide bonds.
AxisPharm offers 4000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.