Fluorescein biotin

Product ID: M4513

Unit SizePriceQuantity 
5 mg

Availability: In stock


Biotinylated fluorescent probe for measuring the concentration of avidin or streptavidin.

Fluorescein biotin can be used for detecting and quantitating biotin-binding sites by either fluorescence or absorbance and the fluorescence or absorbance of this molecule is quenched upon binding to avidin or streptavidin.

Technical Data
SKU M4513
CAS Number 134759-22-1
Unit Size 5 mg
Alternative Names 5-((N-(5-(N-(6-(biotinoyl)amino)hexanoyl)amino)pentyl)thioureidyl)fluorescein
Absorption 494
Emission Wavelength 518
Extinction 78000
Detection Method Fluorescence
Molecular Formula C42H50N6O8S2
Molecular Weight 831.01
Soluble In DMSO, DMF
Storage Conditions 4-8C, Protect from Light, Dessicated

References and Citations


  • Polyelectrolyte surface interface for single-molecule fluorescence studies of DNA polymerase. Kartalov EP, Unger MA, Quake SR, Journal: Biotechniques (2003) 34:505-510
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