Product Details
FAB
- Simple and fast operation - No complicated washing steps, significantly reducing time.
- High batch consistency - Strict control over raw materials and finished product quality, ensuring a stable supply.
- Accurate and reliable results - High sensitivity with minimal matrix effects.
- High throughput capability - Support multiple product specifications, ideal for high-throughput screening.
- Fast completion - Results in just 1 hour.
Product Specifications
Assay TypeCompetition-TR-FRETReactivityHumanRegulatory StatusRUOAssay Time1 hrSample volume10 μLProduct Overview
The Human CD40 / CD40 Ligand Inhibitor Screening Kit (TR-FRET) is based on a homogeneous (no wash) competitive TR-FRET technology (Time-Resolved Fluorescence Resonance Energy Transfer) to screen for inhibitors of human CD40 binding to CD40 Ligand within 0.5-1 hours. It can also be used as a universal detection tool to identify the ability of human CD40 to bind to human CD40 Ligand.
Storage
1. Store the unopened kit at 2-8°C upon receipt.
2. Locate the expiration date on the outer packaging and do not use reagents beyond their expiration date.
3. The opened kit should be stored according to the storage conditions listed in the Components Table. The shelf life of the opened kit is 30 days from the date of opening.
Materials Provided
IDComponentsSizeFRTP018-C01Human CD40 Ligand Europium-chelate100 tests/500 testsFRTP018-C02FA Labeled Human CD40 Protein100 tests/500 testsFRTP018-C03Anti-CD40 Neutralizing Antibody30 μg/100 tests 150 μg/500 testsDB-04TR-FRET Sample Dilution Buffer, pH7.450 mL/100 tests & 500 testsDB-05TR-FRET Detection Buffer, pH7.450 mL/100 tests & 500 testsAssay Principles
This Human CD40 / CD40 Ligand Inhibitor Screening Kit (TR-FRET) is based on TR-FRET technology (Time-Resolved Fluorescence Resonance Energy Transfer). This assay uses the mixture of biotinylated human CD40 Ligand and Europium-chelate labeled streptavidin as the Donor and FA Labeled Human CD40 Protein as the Acceptor.
— When the sample does not contain the inhibitors that block the binding of human CD40 Ligand to human CD40, the Donor and Acceptor are in close proximity because of the binding of human CD40 Ligand and human CD40. Upon Donor excitation with light of a specific wavelength (337nm), in addition to Donor emission (620nm), non-radiative transfer of energy occurs between Donor and Acceptor, resulting in Acceptor emission (665nm).
— When the sample contains the inhibitors that block the binding of human CD40 Ligand to human CD40, the components inhibit the binding between the Donor and Acceptor and thereby prevent FRET from occurring.

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Performance Data
Bioactivity-TR-FRET
Please refer to DS document for the assay protocol.

In this TR-FRET assay, Human CD40 Ligand Europium-chelate is used as the Donor and FA Labeled Human CD40 Protein is used as the Acceptor. An inhibition Assay was performed to evaluate the interaction between human CD40 Ligand and human CD40 using Anti-CD40 Neutralizing Antibody resulting in a typical IC50 of 8.509 nM (QC tested).
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