Fluorescent avidin is a 66 kDa tetrameric glycoprotein labeled with fluorophores providing high fluorescence intensities. Each subunit binds one biotin molecule with high affinity. The affinity of avidin for biotin is even stronger than of streptavidin, however, avidin is highly glycosylated and therefore causes higher background than streptavidin due to nonspecific interactions.
Our Avidin Assay Kits are perfectly suited for binding and fluorescent detection of immobilized biotinylated samples such as proteins and DNA.

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