Biotin-PEG-OH (MW 3400)

Biotin-PEG-OH (3400 Da) is a heterobifunctional linker combining a biotin moiety with a hydrophilic polyethylene glycol chain. This reagent is widely used in bioconjugation for preparing probes for diagnostics, targeted drug delivery systems, and in vitro pull-down assays, leveraging the strong biotin-streptavidin interaction.