ViennaLab Diagnostics GmbH

The ViennaLab RealFast™ Assays are based on real-time PCR and detect single nucleotide polymorphisms (SNPs) and copy number variations (CNVs) fast and simply.

The principle

  • RealFast™ Assays contain hydrolysis probes, also commonly called TaqMan® probes.
  • The sequence-specific oligonucleotide probes carry a fluorescent reporter dye at the 5´-end and a quencher dye at the 3´-end.
  • While the probe is intact, the quencher is close enough to the reporter to suppress the fluorescent signal of the 5´-fluorophore.
  • During the continuous annealing/extension phase of PCR, the probe is cleaved by the 5´ to 3´ exonuclease activity of Taq DNA polymerase, thereby spatially separating the fluorophore from the quencher dye.
  • This process results in detectable fluorescence, which is proportional to the amount of accumulated PCR product.

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