What is a Zen quencher?

What is a Zen quencher?

The ZEN™ quencher is a versatile modification originally developed by IDT as an internal quencher for qPCR 5′-nuclease assay fluorescence-quenched probes (Figure 1). This quencher is placed internally between the 9th and 10th base from the reporter dye on the 5′ end of a probe sequence.

What is quencher and reporter?

The “reporter” (R) dye is attached at the 5′-end of the probe sequence while the “quencher” (Q) dye is synthesized on the 3′-end. A popular combination of dyes is FAM or VIC for the reporter dye and TAMRA for the quencher dye.

Is Tamra a quencher?

TAMRA dye is an effective quencher for fluorophores with emission maxima less than 560 nm. Dyes with longer wavelength emissions will not be effectively quenched by TAMRA. In addition, TAMRA has its own fluorescence which complicates data analysis due to crosstalk between the channels.

How do you use real time PCR?

Real-time PCR steps Figure 1 Real-time PCR involves conversion of RNA to cDNA via reverse transcription, followed by several rounds of PCR to amplify and detect the genes of interest. The products can be detected in ‘real-time’ by using SYBR-green or Taqman probes.

How does a fluorescence quencher work?

Fluorescence quenching is a physicochemical process that lowers the intensity of emitted light from fluorescent molecules. When a molecule absorbs light, electrons in its constituent atoms become excited and are promoted to a higher energy level.

How does the TaqMan assay work?

TaqMan genotyping assays are used to amplify and detect specific alleles in genomic DNA (gDNA). The exonuclease activity of AmpliTaq Gold® DNA Polymerase cleaves only probes hybridized to the target. Cleavage separates the reporter dye from the quencher dye, increasing fluorescence by the reporter.

Is MGB a quencher?

TaqMan MGB Probes incorporate a 5′ fluorescent reporter dye and a 3′ nonfluorescent quencher (NFQ). The NFQ offers the advantage of lower background signal, which results in better precision in quantitation.

What is Tamra PCR?

Applied Biosystems TaqMan TAMRA probes are dual-labeled probes used for real-time PCR applications using TaqMan chemistry. TaqMan TAMRA probes, which were some of the first TaqMan probes to be developed, can be used for a variety of applications. TAMRA is a fluorescent dye and can be multiplexed with up to three dyes.