Amino-PEG9-amine contains two end amino groups. It can undergo a sequential amide coupling to conjugate with two carboxylic acid or activated ester bearing biomolecules to form amide bonds. The PEG spacer increases the solubility of the resulting complex in aqueous media.
Axispharm offers 3000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.