How is luciferase activity measured in cells?
Cell debris is removed by microcentrifugation and luciferase activity is measured using a luminometer. Some luminometers directly inject the reagents into the cell lysate. Such automation allows the signal to be measured at a precise time following injection, which can increase the consistency of the results.
How is luciferase assay measured?
To measure luciferase activity of the cell lysates, you will need a multiwell plate or a tube containing cell lysates and a luminometer. This apparatus detects the photon emission produced from the luciferase reaction and the unit of measurement comes out as relative light units (RLU).
What does passive lysis buffer do?
Passive Lysis Buffer, 5X, is specifically formulated to promote rapid lysis of cultured mammalian cells without the need for scraping adherent cells or performing freeze-thaw cycles.
How can you use a luciferase assay to determine gene activity?
A luciferase assay. To determine if a protein is able to activate (or suppress) transcription of a gene of interest, a scientist uses recombinant DNA technology to produce a construct in which the gene’s promoter is placed adjacent to a luciferase reporter gene.
What wavelength is luciferase assay?
approximately 550 – 570 nm
The luciferase protein from the firefly beetle (Photinus pyralis) is a monomeric enzyme that catalyzes the oxidation of luciferin while emitting light at approximately 550 – 570 nm.
What is dual luciferase assay?
The dual luciferase assay is performed by sequentially measuring the firefly and Renilla luciferase activities of the same sample, with the results expressed as the ratio of firefly to Renilla luciferase activity (Fluc/Rluc).
What are luciferase assays used for?
Luciferase assays can be used to investigate a variety of cellular processes using bioluminescent light output as a sensitive measure of biological activity. We offer a full range of luciferase assay products and tools for your research.
What is dual luciferase reporter assay?
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.
Is luciferase fluorescence or luminescence?
fluorescence. Bioluminescence (left) is emitted from the reaction of luciferase enzyme and its substrate, such as firefly luciferase and luciferin, respectively.
What is difference between fluorescence and luminescence?
The main difference between fluorescence and luminescence is that luminescence describes any process where photons are emitted without heat being the cause, whereas fluorescence is, in fact, a type of luminescence where a photon is initially absorbed, which causes the atom to be in an excited singlet state.
What is firefly luciferase assay?
The Firefly Luciferase HTS Assay is a steady-glow high sensitivity firefly luciferase reporter gene assay kit for the quantification of firefly luciferase expression in mammalian cells with signal half-life of about 3 hours.