FOXA1 Total Biotin Free Assay Kit Human

The AlphaLISA™ SureFire® Ultra™ assay enables the rapid and sensitive detection of total and phosphorylated cellular proteins. AlphaLISA™ assays utilize two bead types: Acceptor Beads and Donor Beads. The Acceptor Bead is coated with a proprietary CaptSure™ agent to specifically immobilize the assay specific antibody which is labeled with a CaptSure™ tag. The Donor Bead is coated with streptavidin to capture the biotinylated antibody.  

In the presence of a target protein, the two target-specific antibodies bring Donor and Acceptor Beads into close proximity. When the Donor Beads are activated by a laser (680 nm), singlet oxygen is transferred to the Acceptor Bead leading to the production of an Alpha signal. The amount of light emission (615 nm) from the Acceptor Bead is directly proportional to the amount of target protein present in the sample. If an Acceptor Bead is not in close proximity (i.e. 200 nm) of a Donor bead, little to no signal is produced over background. 

The assay can be executed in a 1-plate or 2-plate assay protocol (Refer to Manual for more details).  

1-plate assay protocol: culturing of cells, treatment, lysis and assay are performed in a single well, enabling miniaturization in high throughput screening programs. 

2-plate assay protocol: cells are cultured and treated in a 96-well culture plate and lysates are then transferred into a separate plate for assay. This format allows the evaluation of multiple targets from a single lysate. 

Dilutions of FOXA1 recombinant protein were prepared in Lysis Buffer and evaluated using the SureFire® Biotin Free kit.

HeLa wild type (WT) and HeLa-FOXA1 knockout (Abcam ab261823) cell lines were cultured to confluency in T175 flask. Each flask was lysed with 4 mL of Lysis Buffer and cell lysates were assayed for Total FOXA1 using the SureFire® Biotin Free kit. Equivalent to 50,000 cells/datapoint.

Data obtained from measurement of FOXA1 in various cell types lysed with Lysis Buffer. Equivalent to
approximately 5,000 cells/datapoint for adherent cells and 16,000 cells/datapoint for suspension cells.