acid-PEG5-tris-PEG3-DBCO functions as a branched PEG linker possessing three DBCO click chemistry handles to conjugate with azide-containing entities and a terminal carboxylic acid to conjugate with amine-containing entities through activators. The PEG branches enhance the molecule's flexibility and water solubility. Branched linkers allow for more payload or other attachments to ADC.
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