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Quanta qScript™ XLT 1-Step RT qPCR Toughmix, 500 reactions

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qScript XLT 1-Step RT-qPCR ToughMix is a ready-to-use, highly sensitive master mix for reverse transcription-quantitative PCR (RT-qPCR) of RNA templates using hybridization probe detection chemistries such as TaqMan® hydrolysis probes on real-time PCR systems that do not require a passive reference dye. First-strand cDNA synthesis and PCR amplification are carried out in the same tube without opening between procedures.

It is ideal for highly sensitive quantification of RNA viruses or low abundance RNA targets as well as high throughput gene-expression studies. The system has been optimized to deliver maximum RT-PCR efficiency, sensitivity, and specificity in reduced reaction volumes and fast cycle times. qScript XLT One-Step RT-qPCR ToughMix contains all required components for RT-qPCR except RNA template and probe. It is compatible with all dual-labelled probe chemistries.

qScript XLT is an engineered M-MLV reverse transcriptase with reduced RNase H activity and improved activity and stability at higher temperatures.

The use of higher temperatures (50 to 55°C) for the first-strand step of one-step RT-qPCR provides higher specificity for primer annealing and disruption of RNA secondary structure that can interfere with cDNA synthesis.
qScript XLT One-Step RT-qPCR ToughMix is highly resistant to PCR inhibitors. A key component of the ToughMix is an ultra-pure, highly processive thermostable DNA polymerase that is combined with high avidity monoclonal antibodies. This provides an extremely stringent automatic hot-start that minimizes the potential for primer-dimer and other non-specific PCR artefacts. The light blue colour of the AccuVue™ tracer dye simplifies reaction assembly in white, or clear, plates and helps to minimize pipetting or mixing errors. It does not interfere with qPCR performance or affects the stability of the product.

Features & Benefits

  • Tough – Overcomes common inhibitors including polysacharides, haeme/haemoglobin, humic acid,
  • Flexible – Use fast or standard qPCR cycling conditions
  • Broad dynamic range – Reliable data from your precious samples every time
  • Multiplexing: supports detection of up to four targets


Real-Time PCR Instrument Compatibility

  • Roche LightCycler™ 480
  • Qiagen/Corbett Rotor-Gene®
  • Illumina Eco
  • MIC
  • Eppendorf Mastercycler® ep realplex
  • Cepheid SmartCycler®
  • Bio-Rad CFX96™
  • Bio-Rad CFX384™


qScript XLT 1-Step RT-qPCR ToughMix (2X):

2X reaction buffer containing dATP, dCTP, dGTP, dTTP, magnesium chloride, qScript XLT reverse transcriptase, RNase inhibitor protein, hot-start DNA polymerase, AccuVue blue qPCR dye, and stabilisers

Shipping & Storage

qScript XLT 1-Step RT-qPCR ToughMix is stable for one year when stored in a constant temperature freezer at -20°C protected from light. Repeated freezing and thawing does not affect RT-qPCR performance.




Technical Notes

Literature & Media

Application notes for COVID-19 testing




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