PolarScreen™ ER Alpha Competitor Assay, Green
PolarScreen™ ER Alpha Competitor Assay, Green

PolarScreen™ ER Alpha Competitor Assay, Green

The PolarScreen™ ER (Estrogen Receptor) Alpha Competitor Assay Kit, Green, provides a sensitive and efficient method for high-throughput, fluorescence polarization-basedRead more
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Catalog NumberQuantity
A15883800 Assays
A158822500 Assays
Catalog number A15883
Price (USD)
2,110.00
Each
Add to cart
Quantity:
800 Assays
Price (USD)
2,110.00
Each
Add to cart
The PolarScreen™ ER (Estrogen Receptor) Alpha Competitor Assay Kit, Green, provides a sensitive and efficient method for high-throughput, fluorescence polarization-based screening of potential ER alpha ligands. The kit uses insect cell-expressed, full-length, native (untagged) human estrogen receptor alpha (available separately, Cat. No. A15674) and a novel, high-affinity, fluorescent estrogen ligand (Fluormone ES2 Green) in a homogenous, mix-and-read assay format.

This kit produces a green color read-out; a 'red' kit is also available. Both kits suitably determine the IC50s of competitive compounds. Color choice depends on the spectral properties of the compounds to be screened and the available instrumentation. For additional information or assistance contact drugdiscoverytech@lifetech.com.

PolarScreen™ ER Alpha Competitor Assay, Green, is:

• Complete & ready-to-use out of the box—all reagents included, just add your test compounds
• High throughput compatible—800 x 20 μL fluorescence polarization assays in a 384-well plate
• Convenient—available in bulk sizes for larger screening needs

How the Assay Works
Full length ER alpha is added to a fluorescent estrogen ligand to form an ER-Fluormone ES2 complex. This complex is added to individual test compounds in multiwell plates. To determine relative affinity, the assay measures fluorescence polarization. Competing test compounds will displace the Fluormone ES2 ligand from ER alpha, permitting it to tumble rapidly and resulting in low polarization values. A shift in the fluorescence polarization value in the presence of test compound is used to determine the relative affinity of test compounds for ER alpha.

All components are manufactured under the strictest quality parameters. This product's performance, per the Certificate of Analysis, is guaranteed for 6 months after purchase. Contact us for bulk quantities or for assistance with other nuclear receptor assay needs, from assay development to library screening and beyond.
WARNING: Reproductive Harm - www.P65Warnings.ca.gov
For Research Use Only. Not for use in diagnostic procedures.
Specifications
Detection MethodFluorescence
For Use With (Equipment)Fluorescent Imager
Format384-well Plate
Quantity800 Assays
TypeER Alpha Competitor Assay
Unit SizeEach
Contents & Storage
Contains:

• 2 tubes full-length ER Alpha Recombinant Protein (store at -68 to -85°C)
• 1 tube of Fluormone ES2 Green Tracer (store at -5 to -30°C)
• 1 bottle of ES2 Screening Buffer (store at -5 to -30°C)

Frequently asked questions (FAQs)

I'm using the TaqMan hPSC Scorecard Panel. Do I need to use the template files?

We highly recommend that you use the template file because it contains all of the necessary experimental details for your qPCR run. If the template file is not working for you, please send an email to our stem cell technical support specialists at: stemcell-help@thermofisher.com.

Find additional tips, troubleshooting help, and resources within our Real-Time PCR and Digital PCR Applications Support Center

What are the common issues encountered with FP assays?

-No assay window: Check that your instrument is designed to do FP experiments.
-Poor discrimination between the minimum and maximum mP Control (both include the receptor): This may be an indication of the quality of the receptor. Do not make single use aliquots of the receptor or store diluted.
-The type of microplate is critical: Please see if the protocol specifies untreated polystyrene or NBS-coated plates. If the plate binds the fluorescent substrate, it cannot freely rotate and the mP reading will always be high. White plates cannot be used for FP assays. Avoid the use of silanized pipette tips and vials.
-The “No Receptor Control' (free Fluormone/Tracer) should have much higher RFU values compared to buffer alone. If not, there is a problem with the instrument setup or less commonly with the Fluormone/Tracer.
-If the free Fluormone/Tracer mP value is greater than 100 mP or negative, please refer to the user manual for your instrument and reset the G factor.

Find additional tips, troubleshooting help, and resources within our Drug Discovery & Development Support Center.

What is the best type of microplate reader for fluorescence polarization (FP) assays?

For FP assays, plate readers must specifically have FP built in. Please see our instrument compatibility portal (http://www.thermofisher.com/us/en/home/industrial/pharma-biopharma/drug-discovery-development/dd-misc/instrument-compatibility-portal.html).

Find additional tips, troubleshooting help, and resources within our Drug Discovery & Development Support Center.

How can I test the fluorescence polarization (FP) settings of my microplate reader before doing the assay?

We offer a FP One-Step Reference Kit (https://www.thermofisher.com/order/catalog/product/P3088) to detect in green (Ex/Em = 488/535 nm) and red (Ex/Em = 525/590 nm) emission ranges, suitable for the PolarScreen Green and Red Assays. The alternative is to perform the Controls in the respective assay kit prior to performing the actual assay using test compounds.

Find additional tips, troubleshooting help, and resources within our Drug Discovery & Development Support Center.