This kit contains a goat Tb-anti-GST antibody—an equivalent kit containing a rabbit-sourced antibody is also available.

LanthaScreen® TR-FRET CAR Coactivator Assay Kit, goat

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This kit contains Goat Tb-Anti-GST antibody; other kit components are the same as kit A15141:

The LanthaScreen® TR-FRET Constitutive Androstane Receptor (CAR) Coactivator Assay provides a sensitive and robust method for highthroughput screening (HTS) of potential CAR ligands as agonists of ligand-dependent coactivator recruitment or inverse agonists of liganddependent coactivator displacement. The kit uses a terbium-labeled anti-GST antibody, a fluorescein-labeled coactivator peptide, and a CAR ligand-binding domain (CAR-LBD) that is tagged with glutathione-S-transferase (GST) in a homogeneous mix-and-read assay format.

To assay:
When running the LanthaScreen® TR-FRET CAR Coactivator Assay, CAR-LBD is added to ligand test compounds followed by addition of a mixture of the fluorescein-coactivator peptide and terbium anti-GST antibody. After an incubation period at room temperature, the 520 nm/ 495 nm TR-FRET ratio is calculated and can be used to determine the EC50 from a dose response curve of the compound. Based on the biology of the CAR-coactivator peptide interaction, this ligand’s EC50 is a composite value representing the amount of ligand required to bind to receptor, effect a conformational change, and either recruit or displace coactivator peptide (Figures 1 and 2).
For Research Use Only. Not for use in diagnostic procedures.


Format: 384-well plate
Readout: End Point
Technique: TR-FRET
Label or Dye: Tb (Terbium)
Product Size: 800 x 20 µL assays
Detection Method: Fluorescent
Validated Application: Co-Factor Interaction Assay
For Use With (Equipment): Microplate Reader
Shipping Condition: Dry Ice

Contents & storage

The LanthaScreen® TR-FRET CAR Coactivator Assay Kit contains CAR-LBD (GST) protein, fluorescently labeled PGC1a coactivator peptide, terbium-labeled anti-GST antibody, and buffers. Store components as indicated in the assay protocol (-80°C, -20°C, or +4°C).


Manuals & protocols