Avidin-Fluorescein Products

Description

Avidin is a glycoprotein of 66,000 daltons that is highly water soluble. This molecule is stable over a wide range of temperatures and pH. Its usefulness in immunoassays is largely derived from the fact that it can bind four biotin molecules for every molecule of avidin. The binding of avidin to biotin represent one of the strongest noncovalent ionic interactions with a dissociation constant of approxinately 1 x 10-15 M.