RB-PEG-Biotin (MW 5000) (Rhodamine B-PEG-Biotin (MW 5000)) is a fluorescent dye composed of Rhodamine B, PEG, and biotin. The biotin component binds with high affinity to streptavidin or avidin. It plays a crucial role in the specific capture and detection of biomolecules (Ex/Em = 546/610 nm).
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