6-Arm-PEG-Biotin (MW 5000)
https://www.abfrontier.com/shop/cell25sk33375-6-arm-peg-biotin-mw-5000-85773
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6-Arm-PEG-Biotin (MW 5000) is a PEG derivative containing a biotin group. Biotin can form a stable non-covalent bond with streptavidin.
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