Luna® Probe One-Step RT-qPCR Kit (No ROX)Product information
Applicable for COVID-19 research
Many scientists are working very hard to gain more knowledge about the SARS-CoV-2 virus (previously 2019-nCoV) and develop diagnostic tests, treatments and vaccines. Crucial questions about this coronavirus need to be answered so quick and reliable research tools matter now more than ever. We at BIOKÉ support the fight against the COVID-19 pandemic by offering a range of high quality products for virus research, from viral purification kits to qPCR plates, together with our reliable technical support.
Rapid, sensitive and precise probe-based qPCR detection and quantitation of target RNA targets.
Make a simpler choice
- For instruments that do not require the ROX passive reference dye
- Convenient master mix formats and user-friendly protocols simplify reaction setup
- Non-interfering, visible tracking dye helps to eliminate pipetting errors
Experience best-in-class performance
- All Luna® products have undergone rigorous testing to optimize specificity, sensitivity, accuracy and reproducibility
- Products perform consistently across a wide variety of sample sources
- A comprehensive evaluation of commercially-available qPCR and RT-qPCR reagents demonstrates superior performance of Luna products
Optimize your RT-qPCR with Luna WarmStart® Reverse Transcriptase
- Novel, thermostable reverse transcriptase (RT) improves performance
- WarmStart RT paired with Hot Start Taq increases reaction specificity and robustness
Featured VideosView Video Library
Avoiding RNase Contamination
“Dots in Boxes" Visualization of qPCR Data
Overview of qPCR
The Luna Probe One-Step RT-qPCR Kit (No ROX) is optimized for real-time quantitation of target RNA sequences using hydrolysis probes. One-Step RT-qPCR provides a convenient and powerful method for RNA detection and quantitation. In a single tube, RNA is first converted to cDNA by a reverse transcriptase, and then a DNA-dependent DNA polymerase amplifies the cDNA, enabling quantitation via qPCR. Probe-based qPCR/RT-qPCR monitors an increase in fluorescence upon 5´ → 3´ exonuclease cleavage of a quenched, target-specific probe to measure DNA amplification at each cycle of a PCR. At a point where the fluorescence signal is confidently detected over the background fluorescence, a quantification cycle or Cq value can be determined. Cq values can be used to evaluate relative target abundance between two or more samples, or to calculate absolute target quantities in reference to an appropriate standard curve derived from a series of known dilutions.
In the Luna Probe One-Step RT-qPCR Kit (No ROX), Hot Start Taq DNA Polymerase is combined with a novel WarmStart-activated reverse transcriptase, allowing dual control of enzyme activity via reversible, aptamer-based inhibition. This temperature-dependent activation helps to prevent undesirable non-specific priming and extension prior to thermocycling, providing added security for setting up reactions at room temperature. The engineered WarmStart Luna Reverse Transcriptase also possesses higher thermostability than many other RTs, allowing an optimal reaction temperature of 55°C. For difficult targets/templates, higher RT step temperatures of up to 60°C can be used without compromising Luna performance.
Note that to ensure full activation of the WarmStart Luna RT, incubation at temperatures lower than 50°C is not recommended.
The Luna Probe One-Step RT-qPCR Kit (No ROX) is supplied at 2X concentration and contains Hot-Start Taq DNA Polymerase, dNTPs, and all required buffer components. This formulation contains no reference dye and is compatible with any instrument that does not require ROX (if ROX normalization is needed, ROX can be added.) The Reaction Mix features dUTP for carryover prevention and a non-fluorescent visible dye for monitoring reaction setup. This visible dye does not overlap spectrally with fluorophores commonly used in qPCR and does not interfere with real-time detection.
The Luna WarmStart RT Enzyme Mix is supplied at 20X concentration and contains Luna WarmStart Reverse Transcriptase as well as Murine RNase Inhibitor to aid in preventing RNA degradation (see also template preparation in product manual). It is compatible with various RNA sample types (total RNA, poly(A)-RNA, etc.) and sources.
* Data was collected using the Luna Universal Probe One-Step RT-qPCR Kit (NEB #E3006). Luna Probe One-Step RT-qPCR Kit (NO ROX) (NEB #E3007) offers similar performance.
The following reagents are supplied with this product:
|Store at (°C)||Concentration|
|Luna® Probe One-Step Reaction Mix (No ROX)||-20||2 X|
|Luna® WarmStart® RT Enzyme Mix||-20||20 X|
Properties & Usage
- Primer Design
The use of qPCR primer design software (e.g., Primer3) maximizes the likelihood of amplification success while minimizing nonspecific amplification and primer dimers. Targets with balanced GC/AT content (40–60%) tend to amplify most efficiently. Where possible, enter sufficient sequence around the area of interest to permit robust primer design and use search criteria that permit cross-reference against relevant sequence databases (to avoid potential off-target amplification). It is advisable to design primers across known RNA splicing sites in order to prevent amplification from genomic DNA.
- Primer and Probe Concentrations
For most targets, a final concentration of 400 nM (each primer) will provide optimum performance. If needed, primer concentrations can be optimized between 100–900 nM. Probe should be included at 200 nM for best results. Probe concentration can be optimized in the range of 100–500 nM.
When determining which fluorophores to include in a multiplex reaction, be sure to choose compatible reporter dyes and quenchers (e.g., those that can be accommodated by the chosen real-time instrument with minimal overlap in fluorescence spectra). For ROX-dependent instruments, avoid ROX-labeled probes. Include 400 nM of forward and reverse primers and 200 nM probe for each target to be detected in the reaction. For targets that differ significantly in abundance, use of a lower primer concentration (e.g. 200 nM) for the more abundant target(s) is recommended. Adjust concentrations if necessary based on performance (primer 100–900 nM, probe 100–500 nM). When loading a qPCR protocol onto the real-time instrument, be sure to select the appropriate optical channels, as some instruments have a single channel recording mode that would prevent multiplex data collection and analysis. The functionality of the primer and probe sets should be tested individually before attempting a multiplex reaction.
- Amplicon Length
To ensure successful and consistent qPCR results, it is important to maximize PCR efficiency. An important aspect of this is the design of short PCR amplicons (typically 70–200 bp). Some optimization may be required for targets that exceed that range.
- Template Preparation and Concentration
Luna RT-qPCR is compatible with RNA samples prepared through typical nucleic acid purification methods. Prepared RNA should be stored in an EDTA-containing buffer (e.g., 1X TE) for long-term stability, and dilutions should be freshly prepared for a qPCR experiment in either TE or water. Note that the quality of RNA templates can greatly affect RT-qPCR efficiency. RNA should be handled with appropriate precautions to prevent RNase or DNase contamination. Use of nuclease-free water (provided) is strongly recommended. Where useful, RNA may be treated with DNase I to remove contaminating genomic DNA.
Generally, a useful concentration of standard and unknown material will be in the range of 108 copies to 10 copies. Note that for dilutions in the single-copy range, some samples will contain multiple copies and some will have none, as defined by the Poisson distribution. For total RNA, Luna One-Step Kits can provide linear quantitation over an 8-order input range of 1 μg – 0.1 pg. For most targets, a standard input range of 100 ng – 10 pg total RNA is recommended. For purified mRNA, input of ≤ 100 ng is recommended. For in vitro-transcribed RNA, input of ≤ 109 copies is recommended.
- ROX Reference Dye
Some real-time instruments recommend the use of a passive reference dye (typically ROX) to overcome well-to-well variations that could be caused by machine limitations such as “edge effect”, bubbles, small differences in volume, and autofluorescence from dust or particulates in the reaction. However, ROX normalization does little to the variations caused by pipetting errors of templates/primers, heterogeneous mixing, and evaporation/condensation issues.
A universal passive reference dye is included in the following Luna® qPCR products: Luna Universal qPCR Master Mix (NEB #M3003), Luna Universal Probe qPCR Master Mix (NEB #M3004), Luna Universal One-Step RT-qPCR Kit (NEB #E3005), and Luna Universal Probe One-Step RT-qPCR Kit (NEB #E3006). These products support broad instrument compatibility (High-ROX, Low-ROX, ROX-independent) so no additional ROX is required for normalization.
The Luna Probe One-Step RT-qPCR Kit (No ROX) (E3007) contains no reference dye and is compatible with any instrument that does not require ROX. If ROX normalization is needed, ROX can be added. Please refer to instrument manufacturer’s instructions for greater details.
- Carryover Contamination Prevention
RT-qPCR is an extremely sensitive method, and contamination in new RT-qPCR assays with products from previous amplification reactions can cause a variety of issues, such as false positive results and a decrease in sensitivity. The best way to prevent this “carryover” contamination is to practice good laboratory procedures and avoid opening the reaction vessel post amplification. However, to accommodate situations where additional anti-contamination measures are desired, Luna qPCR mixes contains a mixture of dUTP/dTTP that results in the incorporation of dU into the DNA product during amplification. Pretreatment of qPCR/RT-qPCR experiments with uracil DNA glycosylase (UDG) will eliminate previously-amplified uracil-containing products by excising the uracil base to produce a non-amplifiable DNA product. The use of a thermolabile UDG is important, as complete inactivation of the UDG is required to prevent destruction of newly synthesized qPCR products.
To enable carryover prevention, 0.025 units/μl Antarctic Thermolabile UDG (NEB #M0372) should be added to the reaction mix. To maximize elimination of contaminating products, set up the qPCR experiments at room temperature or include a 10 minute incubation step at 25°C before the initial denaturation step.
- Reaction Setup and Cycling Conditions
Due to dual hot-start feature of Luna One-Step Kits, it is not necessary to set up reactions on ice or preheat the thermocycler prior to use.
For 96-well plates, a final reaction volume of 20 μl is recommended.
For 384-well plates, a final reaction volume of 10 μl is recommended.
When programming instrument cycling conditions, ensure a plate read is included at the end of the extension step, and a denaturation (melt) curve after cycling is complete to analyze product specificity.
Amplification for 40 cycles is sufficient for most applications, but for very low input samples 45 cycles may be used.
Protocols, Manuals & Usage
FAQs & Troubleshooting
- How do I use qPCR to determine the concentration of my material?
- Can I set up my Luna® RT-qPCR at room temperature?
- What is the difference between probe- and dye-based versions of the Luna® qPCR Mixes?
- Should I use probe- or dye-based detection for my qPCR assays?
- How should I design primers for Luna® qPCR?
- How long should my amplicon be for qPCR?
- Why is the Luna® qPCR Mix blue? Will this dye interfere with detection?
- Can I use fast cycling conditions with the Luna® qPCR Mix?
- Do I need to add ROX?
- How many dilutions should I use to make a standard curve?
- Why does NEB recommend 40-45 cycles?
- Does the Luna® qPCR Mix contain dUTP? Can I use carryover contamination prevention methods?
- Can I run multiplex reactions with the Luna® Probe One-Step RT-qPCR Kits? Do I need to change my reaction conditions?
- Can I use a ROX-labeled probe with the Luna® Probe Mix that contain a reference dye?
- Can alternative probe based detection strategies be used with the Luna® Probe Mix?
- How much primer and probe should I use with the Luna® Universal Probe RT-qPCR Kit?
- How do I choose between one-step RT-qPCR and two-step RT-qPCR?
- What RNA samples can be used in RT-qPCR with the Luna® Mix?
- How much RNA template should I use in my RT-qPCR reaction?
- Can I use longer targets in one-step RT-qPCR?
- What temperature should I use for cDNA synthesis with Luna® RT-qPCR kits?
- Should I include a no Luna® WarmStart® Enyzme Mix control (-RT Control)?
- Is the Monarch® Total RNA Miniprep Kit compatible with Luna® RT-qPCR Reagents?
- Are the Monarch RNA Cleanup Kits compatible with Luna RT-qPCR reagents?
- Can I use shorter cycling times?
Quality, Safety & Legal
Quality Assurance StatementQuality Control tests are performed on each new lot of NEB product to meet the specifications designated for it. Specifications and individual lot data from the tests that are performed for this particular product can be found and downloaded on the Product Specification Sheet, Certificate of Analysis, data card or product manual. Further information regarding NEB product quality can be found here.
SpecificationsThe Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]
Certificate Of AnalysisThe Certificate of Analysis (COA) is a signed document that includes the storage temperature, expiration date and quality controls for an individual lot. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]_[Lot Number]
Safety DataSheetsThe following is a list of Safety Data Sheet (SDS) that apply to this product to help you use it safely.
Luna® Probe One-Step Reaction Mix (No ROX)
Luna® WarmStart® RT Enzyme Mix
Legal and DisclaimersThis product is covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB).
While NEB develops and validates its products for various applications, the use of this product may require the buyer to obtain additional third party intellectual property rights for certain applications.
For more information about commercial rights, please contact NEB's Global Business Development team at [email protected].
This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.
New England Biolabs (NEB) is committed to practicing ethical science – we believe it is our job as researchers to ask the important questions that when answered will help preserve our quality of life and the world that we live in. However, this research should always be done in safe and ethical manner. Learn more.
LicensesNotice to Purchaser: Nucleic-acid based aptamers for use with thermophilic DNA polymerases are licensed exclusively by New England Biolabs, Inc. from SomaLogic, Inc. (See Patent Nos. 5,474,096; 5,670,637; 5,696,249; 5,874,557; and 5,693,502). New England Biolabs, Inc. gives the Buyer/User a non-exclusive license to use the aptamer-based Luna® Universal Probe One-Step RT-qPCR Kit for Research Purposes Only. Commercial use of the aptamer-based Luna® Universal Probe One-Step RT-qPCR Kit requires a license from New England Biolabs, Inc. Please contact [email protected] for more information.
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