Fluorescein biotin (5-((N-(5-(N-(6-(Biotinoyl)amino)hexanoyl)amino)pentyl)thioureidyl) fluorescein) can be used to detect and quantify biotin binding sites and the degree of biotinylation of proteins. Also see biotin-rhodamine 110 (80022) and biotin-4-fluorescein (90062).

• λ_Ex/λ _Em= 494/518 nm
• Yellow solid soluble in DMSO, or DMF
• Store at -20°C and protect from light
• C₄₂H₅₀N₆O₈S₂
• MW: 831
• [134759-22-1]

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