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SCRIPT Direct RT-qPCR ProbesMaster UNG highROX

Robust real-time RT-PCR master mix with UNG and ROX

for highly sensitive and specific amplification directly from tissue, swabs or whole blood

Cat. No. Amount Price (EUR) Buy / Note
PCR-531S 2 x 1,25 ml (250 reactions x 20 μl) 0,00 Add to Basket/Quote Add to Notepad
PCR-531L 10 x 1,25 ml (1250 reactions x 20 μl) 0,00 Add to Basket/Quote Add to Notepad

For in vitro use only!

Shipping: shipped on gel packs

Storage Conditions: store at -20 °C
avoid freeze/thaw cycles
stable at 4 °C for up to 4 weeks

Shelf Life: 12 months

Form: liquid

Concentration: 2x

Description:
SCRIPT Direct RT-qPCR ProbesMaster UNG highROX is designed for quantitative real-time analysis of target RNA directly from animal- or plant tissue, swabs and whole blood. The mix allows robust amplification avoiding the requirement of any prior RNA purification procedures.
The mix is recommended for use with dual-labeled fluorescent probes, e.g. TaqMan®, Molecular Beacon or Scorpion probes. It provides a powerful tool for multiplex-quantification of sample RNA in a broad dynamic range with exceptional sensitivity and precision.
The mix contains all reagents required for RT-qPCR (except template, primer and labeled fluorescent probe) in a premixed 2 x concentrated ready-to-use solution. High robustness, reliability and sensitivity of the mix are based on a genetically engineered reverse transcriptase and an antibody-blocked hot start polymerase in combination with an optimized and well-balanced buffer system.
The mix ensures fast and easy preparation with a minimum of pipetting steps and is specially recommended for:

  • Direct amplification of target RNA from various tissues samples
  • Direct detection of viral or bacterial RNA in nasal or throat swabs
  • Direct PCR from whole blood samples
  • Point-of-Care diagnostics.
Multiplexing Capability
Real-time RT-PCR technology based on dual-labeled DNA probes provides a high sensitive and specific RT-PCR system with multiplexing capability. The simultaneous detection of multiple targets in a single tube requires a primer/probe set for each target amplification. Sequences and concentrations of primers and probes should be optimized to avoid mutual influence, secondary structures and primer-dimer formations. Amplification of each target is detected in a separate fluorescence channel.

UNG (Uracil-N-Glycosylase)
The mix contains UNG (Uracil-N-Glycosylase) and dUTP instead of dTTP to eliminate carry-over contamination of DNA from previous PCR reactions. The UNG treatment at the onset of thermal cycling removes uracil residues from dU-containing DNA and prevents it from serving as template.

ROX Reference Dye
SCRIPT Direct RT-qPCR ProbesMaster UNG highROX contains 500 nM ROX passive reference dye in the final assay. The dye does not take part in the PCR reaction but allows normalization for non-PCR related signal variation and provides a baseline in multiplex reactions. The reaction chemistry of the kit is optimized for real-time cyclers that are compatible with the evaluation of the ROX reference signal.

Content:
SCRIPT Direct RT-qPCR ProbesMaster UNG highROX
2x conc. mix of Reverse Transcriptase, antibody-blocked Hot Start polymerase, UNG, dNTPs, ROX, reaction buffer, additives and stabilizers

Extraction Buffer (Please handle with care and wear personal protective equipment!)
10x conc.

PCR-grade Water

Procedure
Before starting, take reagents out from fridge and allow to thaw completely. Vortex all reagents briefly and spin down the liquids.

1. Sample preparation
1.a Whole Blood (not recommended for heparin-, EDTA- or citrate-treated whole blood)

  • Add whole blood (1-2 μl for 20 μl or 2-5 μl for 50 μl total assay volume) without any pre-treatment directly to the qPCR assay


1.b Samples from nasal or throat swabs

  • Dilute 10x Extraction buffer to 1x with PCR-grade water
  • Transfer 200 μl 1x Extraction Buffer into a 1.5 ml microtube
  • Cut off the cotton tip with the collected nasal or throat swab and place it in the micro tube
  • Close the tube and vortex for 15 sec
  • Incubate at room temperature (20-25 °C) for 2-3 min
  • Remove the cotton tip and squeeze it out at the rim of the tube
  • Centrifuge briefly and transfer 1-5 μl of the supernatant (1-2 μl for 20 μl or 2-5 μl for 50 μl total assay volume) to the RT-qPCR assay


1.c Samples from Animal or Plant Tissue

  • Prepare a small piece from animal or plant tissue not exceeding 8 mm in diameter
  • Crack plant seeds to less than 1 mm in diameter using a BeadBeater, Tissue Lyser or small hammer
  • Place the sample in a 1.5 ml microtube
  • Add Extraction Buffer to the tissue sample as following:


Sample size (diameter)1-2 mm3-4 mm5-8 mm
PCR-grade water45 μl90 μl180 μl
Extraction Buffer5 μl10 μl20 μl

  • Mix briefly by tapping or vortexing and make sure that the sample is soaked with Extraction Buffer
  • Incubate at room temperature (20-25 °C) for 3 min
  • Centrifuge briefly and transfer 1-5 μl of the supernatant (1-2 μl for 20 μl or 2-5 μl for 50 μl total assay volume) to the RT-qPCR assay
  • If sample is liquid: Dilute 10x Extraction buffer to 2x with PCR-grade water. Add 2x Extraction buffer to your sample in a ratio of 1:1.


2. Preparation of the PCR Assay
Preparation of a master mix is crucial in quantitative PCR reactions to reduce pipetting errors. Prepare a master mix of all components except template as specified below. A reaction volume of 20-50 μl is recommended for most real-time instruments. Pipet with sterile filter tips and minimize the exposure of the labeled DNA probe to light. Perform the setup in an area separate from DNA preparation or analysis. No-template controls should be included in all amplifications.

componentstock conc.final conc.20 μl
assay
50 μl
assay
SCRIPT Direct RT-qPCR ProbesMaster UNG highROX2x1x10 μl25 μl
Extracted Sample or whole blood--1-2 μl2-5 μl
Forward Primer 11)10 μM300 nM0.6 μl1.5 μl
Reverse Primer 11)10 μM300 nM0.6 μl1.5 μl
TaqMan® / Dual Labeled Probe 11)10 μM200 nM0.4 μl1 μl
Forward Primer 22)10 μM300 nM0.6 μl1.5 μl
Reverse Primer 22)10 μM300 nM0.6 μl1.5 μl
TaqMan® / Dual Labeled Probe 22)10 μM200 nM0.4 μl1 μl
PCR-grade water--fill up to
20 μl
fill up to
50 μl

1) The optimal concentration for primers and probe may vary from 100 to 500 nM and should be optimized for each new assay set-up
2) Required only for multiplex PCR applications

Mix the tubes briefly and spin down to remove bubbles.
3. RT-PCR Cycling
Switch on the real-time PCR cycler and set all cycling parameters as recommended in the table below. Place the vials into the instrument and start the program.

Reverse
transcription3)
50-55 °C10-15 min1x
Initial
denaturation
95 °C5 min1x
Denaturation
Annealing and elongation
95 °C
60-65 °C 4)
15 sec
30-60 sec5)

35-45x

3) A reverse transcription time of 10 min is recommended for optimal amplicon lengths between 100 and 200 bp. Longer amplicons up to 500 bp may require a prolonged incubation of 15 min. Add 3 min for each additional 100 bp. The optimal temperature depends on the structural features of the RNA. Increase the temperature to 55°C for difficult templates with high secondary structure. Note that optimal reaction time and temperature should be adjusted for each particular RNA.
4) The annealing temperature depends on the melting temperature of the primers.
5) The elongation time depends on the length of the amplicon. A time of 30 sec is sufficient for fragments < 500 bp.

To obtain optimal specificity and amplification results an individual optimization of the recommended parameters is recommended for each particular sample/primer pair.

4. Data Analysis

  • Calculate ct-values and evaluate the data according to the instruction of the cycler and requirements of the experiment/application.