Biotin-PEG4-Amide-Tri(3-methoxypropanamide-PEG4-Azide) Methane constitutes a branched PEG linker with a biotin moiety for connection with antibodies, proteins, and any other biomolecules. The terminal azides allow for copper-free catalyzed click chemistry with alkyne, BCN, and DBCO. The PEG spacers impart solubility in aqueous media.
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