N-(Acid-PEG36-PEG3-)-N-bis(PEG3-biotin) is a branched biotin linker that can be used for protein labeling. The carboxylic acid group can react with primary amines in the presence of activators such as EDC and HATU. The hydrophilic PEG branch increases the water solubility of the compound. Reagent grade, for research use only.
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