8-arm PEG-(CH2)3CO2H, MW 20,000 is an 8-arm branched PEG linker with eight carboxylic acid groups. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. HATU) to form a stable amide bond. Reagent grade, for research use only.
Usually ships within 24 hours.