Fluorescein-PEG2-Biotin is a xanthene dye with excitation/emission maximum of 494/517 nm and a terminal biotin group with hydrophilic PEG spacer arm. The biotin group is effective at binding proteins such as binding to avidin, streptavidin or neutravidin. The hydrophilic PEG spacer can increase aqueous solubility of the biotin conjugated molecules. It also can also help minimize steric hindrance and provide extra flexibility with the binding to stravidin and avidin molecules. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
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