Biotin-PEG4-Amide-PEG8-3,4-Dibromo-Mal is a PEG linker featuring a dibromo-maleimide linked to a biotin group. Biotin is used for affinity-based applications such as pull-down assays or for ligating with streptavidin proteins. The unsaturated dibromo motif allows this linker to bind two thiols at a time.
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