Dual-Luciferase® Reporter Assay System


The Dual-Luciferase® Reporter (DLR™) Assay System provides an efficient means of performing two reporter assays. In the DLR™ Assay, the activities of firefly (Photinus pyralis) and Renilla (Renilla reniformis or sea pansy) luciferases are measured sequentially from a single sample. The firefly luciferase reporter is measured first by adding Luciferase Assay Reagent II (LAR II) to generate a luminescent signal lasting at least one minute. After quantifying the firefly luminescence, this reaction is quenched, and the Renilla luciferase reaction is initiated simultaneously by adding Stop & Glo® Reagent to the same sample. Both assays can be completed in about 4 seconds using a luminometer with reagent auto-injectors. In the DLR™ Assay System, both reporters yield linear assays with attomole (<10–18) sensitivities and no endogenous activity in the experimental host cells. Furthermore, the integrated format of the DLR™ Assay provides rapid quantitation of both reporters either in transfected cells or in cell-free transcription/translation reactions.

For best results with the Dual-Luciferase® Assay, we recommend using a luminometer that has been validated for use with the assay. These luminometers are qualified as DLReady™. For a listing of qualified instruments, please visit the DLReady™ Validated Luminometers page.

The pGL4 Luciferase Reporter Vectors are designed for use with the DLR™ Assay Systems. A Renilla luciferase vector with constitutive expression may be used in combination with any experimental firefly luciferase vector to co-transfect mammalian cells.

Notice for Cat.# E1960 and E1980 : Sufficient Passive Lysis Buffer is provided to perform 1,000 assays with cells grown in 96-well plates (typically 20μl of 1X PLB per well). For applications requiring more lysis reagent (e.g., >100μl/well), additional Passive Lysis Buffer may be purchased separately.

Features – Benefits

  • Greater Accuracy : Renilla luciferase internal control allows more accurate results.
  • Convenience : Samples don’t have to be split; saves plates and time.
  • Sensitivity : Allows study of weak promoters, low-level expression/regulation and expression in cells that transfect poorly.
  • Linearity : Range extends 7 logs; very active samples typically do not need dilution.


Product Size Brand Catalog
Dual-Luciferase® Reporter Assay System 100 assays Promega E1910
Dual-Luciferase® Reporter Assay System 10-Pack 1000 assays Promega E1960
Dual-Luciferase® Reporter 1000 Assay System 1000 assays Promega E1980


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