- High affinity
Streptavidin has been labeled with d2. Biotin binds to Streptavidin with high affinity (Ka=1015M-1). The binding is rapid and stable, making it an ideal choice for use in a variety of assays such as enzyme assays, protein-protein binding assays and molecular biology assays.
In an HTRF interaction assay, one partner is labeled (directly or indirectly) with the donor, and the other with the acceptor (again, directly or indirectly). The intensity of the signal is proportional to the binding of the 2 partners.
In the example shown here: Streptavidin-d2 binds to the biotinylated partner A while partner B* binds to a specific antibody labeled to an HTRF donor.
The example on the right describes the protocol using a 20 µL final assay volume for detecting an interaction between a biotinylated-tagged partner A and a non-tagged partner B*.
Dispense the 2 partners (10 µL), incubate, add Streptavidin-d2 (5 µL) and anti-partner B labeled with donor (5 µL), incubate and read.
*partner B can also be tagged, Fc fused or directly labeled. In these cases use for the detection, the corresponding HTRF reagent (anti-Tag, anti species, protA, Streptavidin), labeled with donor.
In collaboration with Lead Discovery Center GmbH - Scientific Presentations
Benefit from unlimited flexibility for your assay development - Flyers
In collaboration with Boehringer Ingelheim - Posters
Every interaction is within range - Technical Notes
610SADLF-610SADLA-610SADLB - Product Insert
Easy pharmacological characterization of PPI modulators. - Technical Notes
Deciphering low- and high affinity interactions - Application Notes
Monitoring nuclear receptor binding with HTRF assays - Application Notes
Challenge large complexes with HTRF assays - Application Notes