Bio-Layer Interferometry (BLI) is an optical technique for measuring macromolecular interactions by analyzing interference patterns of white light reflected from the surface of a biosensor tip. BLI experiments are used to determine the kinetics and affinity of molecular interactions. In a BLI experiment, one molecule is immobilized to a Dip and Read Biosensor and binding to a second molecule is measured. A change in the number of molecules bound to the end of the biosensor tip causes a shift in the interference pattern that is measured in real-time.
The CMI has two ForteBio instruments for measuring BLI: the Octet RED384 and the BLItz. The Octet RED384 is more sensitive and higher throughput and can be used for macromolecular and small molecule binding experiments. The BLItz uses a very small sample volume, but is more time consuming and cannot measure molecules smaller than 10 KDa.
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