Fluorescein biotin

This bifunctional biotin derivative is used for spectrophotometric determination of biotinylation degree. The assay is based on the kinetic analysis of the enhancement of fluorescence of streptavidin/fluorescein biotin complexes in the presence of biotin. The fluorescence enhancement of fluorescein biotin is proportional to the concentration of biotin. Because the assay is amenable for use in small volumes of 5-50 uL or bead-based assays, the detection limits can be extended to the femtomole range. The dynamic aspects allow the assay to be extended to a broader range of applications including its use as an indicator of reagent mixing in laminar-flow assays carried out in microfluidic devices.

Protocol

SDS

COA

Catalog	Size	Price	Quantity
3017	5 mg	Price

References

View all 17 references: Citation Explorer

Engineered single-chain dimeric streptavidins with an unexpected strong preference for biotin-4-fluorescein

Authors:

Aslan FM, Yu Y, Mohr SC, Cantor CR.

Journal:

Proc Natl Acad Sci U S A (2005): 8507

Dynamics of fluorescence dequenching of ostrich-quenched fluorescein biotin: a multifunctional quantitative assay for biotin

Authors:

Wu Y, Simons PC, Lopez GP, Sklar LA, Bur and a T., undefined

Journal:

Anal Biochem (2005): 221

Preparation and characterisation of antibody modified gelatin nanoparticles as drug carrier system for uptake in lymphocytes

Authors:

Balthasar S, Michaelis K, Dinauer N, von Briesen H, Kreuter J, Langer K.

Journal:

Biomaterials (2005): 2723

Electrophoretic behavior of streptavidin complexed to a biotinylated probe: a functional screening assay for biotin-binding proteins

Authors:

Humbert N, Zocchi A, Ward TR.

Journal:

Electrophoresis (2005): 47

Controlled surface functionalization of silica nanospheres by covalent conjugation reactions and preparation of high density streptavidin nanoparticles

Authors:

Schiestel T, Brunner H, Tovar GE.

Journal:

J Nanosci Nanotechnol (2004): 504

Physical properties

Molecular weight	1033.39
Solvent	DMSO

Spectral properties

Absorbance (nm)	487
Correction factor (260 nm)	0.32
Correction factor (280 nm)	0.35
Extinction coefficient (cm ^-1 M ^-1)	80000 ¹
Excitation (nm)	498
Emission (nm)	517
Quantum yield	0.7900 ¹ , 0.95 ²

Storage, safety and handling

H-phrase	H303, H313, H333
Hazard symbol	XN
Intended use	Research Use Only (RUO)
R-phrase	R20, R21, R22
Storage	Freeze (< -15 °C); Minimize light exposure
UNSPSC	12352200
CAS	134759-22-1

Documents

Protocol
Safety Data Sheet
Certificate of Analysis

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Page updated on October 20, 2025