IRF1 Total 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. 

Data obtained with a 2-plate, 2-incubation protocol. THP-1 cells were seeded at 200K cells/well in a 96-well plate. Cells were treated with increasing concentrations of IFNβ or IFNγ for 4 hours. Cells were washed with HBSS, lysed with Lysis Buffer and assayed separately for Total IRF1 and Total ERK using respective SureFire® Ultra kits. Equivalent to approximately 20,000 cells/datapoint.

A549 wild type (WT) and IRF1 KO (Abcam ab267042) cells were cultured to confluency in T175 flasks in 10% FBS containing medium. Cells were treated with 10 ng/mL IFNβ for 4 hours and then lysed in 6 mL of Lysis Buffer. Total IRF1 levels were evaluated using the SureFire® Ultra kit. Equivalent to approximately 20,000 cells/datapoint.

Data obtained with a 2-plate, 2-incubation protocol. A431 cells were seeded at 40K cells/well in a 96-well plate and incubated overnight. Cells were treated with increasing concentrations of IFNβ or IFNγ for 4 hours. Cells were lysed with Lysis Buffer and assayed separately for Total IRF1 and Total ERK using respective SureFire® Ultra kits. Equivalent to approximately 4,000 cells/datapoint.

Data obtained from measurement of IRF1 Total in various cell types lysed with Lysis Buffer. Equivalent to approximately 20,000 cells/datapoint.