The AlphaScreen® SureFire® total Topoisomerase II-α assay is a sandwich immunoassay for quantitative detection of Topoisomerase II-α (both phosphorylated and non-phosphorylated) in cellular lysates using Alpha Technology. This assay is intended to be used as a normalization for phosphorylation studies. Please note that an AlphaScreen Protein A kit, which contains the Alpha Beads necessary to run this assay, needs to be purchased separately in addition to the AlphaScreen SureFire kit.
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Alpha SureFire® kits can be used for:
In the AlphaScreen® SureFire® assay, Donor beads are coated with streptavidin to capture one of the antibodies, which is biotinylated. Acceptor beads are coated with Protein A to immobilize the other antibody. In the presence of target protein, the two antibodies bring the Donor and Acceptor beads close together, generating signal. The amount of light emission is directly proportional to the amount of protein present in the sample.
|Assay Target||Topo IIα|
|Assay Target Class||Protein|
|Experimental Type||In vitro|
|Product Brand Name||AlphaScreen SureFire|
|Shipping Condition||Blue Ice|
|Unit Size||50,000 assay points|
Screening kinase activities in cell-based assays offers advantages over the more traditional biochemical approach of using a purified recombinant enzyme to phosphorylate a substrate, since a cell-based assay gives information on a compound’s activity in a more biological context. However, getting initial results with the AlphaScreen® SureFire® assay is highly dependent on optimal cell culture conditions, and often requires that multiple parametersbe optimized in the first set of experiments.
The interactions and bindingof proteins are implicated in a large number of biological processes. The needfor an efficient, highly sensitive assay to study large protein interactions is increasingly important. Alpha Technology is a highly flexible, homogeneous, no-wash assay ideal for the measurement of protein interactions and complexes as large as 200 nm in size
The AlphaScreen® SureFire® Total Topoisomerase IIa assay is used to measure endogenous Topoisomerase IIa in cellular lysates. The assay is an ideal system for the screening of both modulators of receptor activation (e.g. agonists and antagonists) as well as agents acting intracellularly, such as small molecule inhibitors of upstream events.
Cell lines validated for use with AlphaScreen® SureFire® kits