Supplier: SIGMA ALDRICH MICROSCOPY

Useful for quantitating biotin binding sites. This reagent binds to avidin more quickly than conventional fluorescein biotin.

Supplier: AAT BIOQUEST

This bifunctional biotin-fluorescein conjugate demonstrates better binding and stronger fluorescence than biotin fluorescein.

Supplier: Biotium

Biotin-4-fluorescein (N-(5-aminopentyl)biotinamide, trifluoroacetic acid salt) has been reported to be a superior fluorescent biotin derivative for accurate measurement of avidin and streptavidin in crude biological samples. Binding of biotin to avidin and streptavidin is high affinity, fast and noncooperative.