Revvity, L0005RED, Tag-lite Opioid Receptor Red Antagonist Ligand

Overview
Tag-lite receptor binding assays use either a green or a red fluorescent ligand to function. This Opioid receptor red antagonist is a naltrexone derivative labeled with a red emitting HTRF fluorescent probe.
This ligand is best suited for use in the Opoid Delta, Kappa and Mu receptor binding assays.
Tag-lite assays offer many features and applications over traditional receptor/ligand binding assays:

Non-radioactive
Homogeneous and filtration-free
Ready-to-use kits and reagents for binding assays
Does not alter the receptor pharmacology
Peer-reviewed, validated technology
Thorough kinetic studies with true Kd and Ki values, association (Kon) and dissociation (Koff) rate constants
Screening and profiling of biologics and large molecules
How it works
Assay principle
Running a receptor binding assay using Tag-lite is as easy as it can get. Simply dispense 10 µL of  labeled cells (C1TT1DOP or C1TT1MOP or C1TT1KOP) into each well, followed by 5 µL of labeled ligand (L0005RED) and 5 µL of the compound you wish to test. Like all HTRF assays, Tag-lite assays do not require any washing steps. A diagram of the procedure to be followed is given on the right.

Saturation binding (KD)
A saturation binding assay measures total and non-specific binding for increasing concentrations of ligand under equilibrium conditions. To perform the assay, the fluorescent ligand is titrated into a solution containing a fixed amount of labeled cells and then incubated to equilibrium. The HTRF ratio obtained from this titration is the total binding.

Competitive binding (KI)
A competitive binding assay is performed to measure the dissociation constant, Ki. To perform the assay, the compound is titrated into a solution containing a fixed concentration of fluorescent ligand and a fixed amount of cells. Application-Receptor-Ligand Binding
Brand-Tag-lite
Detection Modality-HTRF
Product Group-Fluorescent Reagent
Shipping Conditions-Shipped in Dry Ice
Target Class-GPCR
Technology-TR-FRET
Therapeutic Area-Metabolism/Diabetes Neuroscience Oncology & Inflammation
Unit Size-5,000 assay points