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ReadyScript® cDNA Synthesis Mix

Complete reagent for first strand cDNA synthesis for RT-qPCR

Synonym: cDNA Synthesis Mix



Related Categories Molecular Biology, PCR/Amplification, RT-PCR and RT-qPCR More...
color   colorless
shipped in   dry ice
storage temp.   −20°C


General description

ReadyScript cDNA Synthesis Mix is a sensitive and easy-to-use solution for two-step RT-PCR. This 5X concentrated mix provides all necessary components (except RNA template) for first-strand synthesis including: buffer, dNTPs, MgCl2, primers, RNase inhibitor protein, ReadyScript reverse transcriptase and stabilizers. ReadyScript is a RNase H(+) derivative of MMLV reverse transcriptase, optimized for reliable cDNA synthesis over a wide dynamic range of input RNA. The unique blend of oligo (dT) and random primers in the ReadyScript cDNA Synthesis Mix works exceptionally well with a wide variety of targets. It is optimized for the production of targets < 1kb in length. ReadyScript cDNA Synthesis Mix produces excellent results in both real-time and conventional RT-PCR.


• For cDNA synthesis
• For gene expression quantitation (RT-PCR & qRT-PCR)
• For cDNA library synthesis

Features and Benefits

• Contains a blend of randomers and oligo (dT) primers in a specific ratio to ensure optimal representation of all transcript sequences in the cDNA product
• Premixed master mix eliminates variability inherent in other kits requiring mixing of components
• RNase H(+) enzyme ensures residual RNA does not interfere with PCR amplification
• Wide input range of template means it can reverse transcribe both rare and abundant genes

• Convenient 5X master mix formula provides for quick and easy reaction set up; just add RNA template
• Includes proprietary blend of randomers and oligodT primers and an RNAse H+ derivative of Moloney murine leukemia virus (MMLV) reverse transcriptase
• Allows for unbiased, accurate conversion of RNA to cDNA in just 40 minutes
• Can use up to 1 μg of RNA in a single 20 μL reaction; reactions can also be scaled up
• Highly stable; can be stored at -20°C for up to 1 year; 4°C for up to one month


Supplied as a 5X reaction buffer containing optimized concentrations of MgCl2, dNTPs (dATP, dCTP, dGTP, dTTP), recombinant RNase inhibitor protein, ReadyScript reverse transcriptase, random primers, oligo(dT) primer and stabilizers.

Other Notes

Stable for 1 year when stored in a constant temperature freezer at -20 °C. To extend product′s shelf-life, store the kit at -70 °C. Readyscript cDNA Synthesis Mix showed no loss in functional performance after 20 cycles of freezing on dry ice and thawing on ice. However, we recommend keeping the freeze-thaw cycles to a minimum.

Legal Information

ReadyScript is a registered trademark of Sigma-Aldrich Co. LLC

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis

Protocols & Articles


Reverse Transcription - PCR Technologies Guide

Use the table of contents on the right to navigate to other sections of A Technical Guide to PCR Technologies.
A Technical Guide to PCR Technologies
Keywords: Degradations, Gene expression, Nucleic acid hybridization, PAGE, Polymerase chain reaction, Polymerase chain reaction - quantitative, Purification, Transcription


Imprint RIP | uRNA Quantitation | MicroRNA primers | MicroRNA Reverse Transcription

Sigma’s Imprint RNA Immunoprecipitation Kit was used to co-purify human argonaute 2 (Ago2)-associated RNAs from HeLa cells, essentially as instructed in the Technical Bulletin. To evaluate the differ...
Carol Kreader
Principal R&D Scientist
Keywords: Buffers, Cell disruption, Immunoprecipitation, Polymerase chain reaction - quantitative, RNA immunoprecipitation, Western blot

Reverse Transcription Using ReadyScript cDNA Synthesis RDRT Protocol

Place components on ice. Mix, and then briefly centrifuge to collect contents at the bottom of the tube
Keywords: Amplification, Digestions, Gene expression, Polymerase chain reaction, Polymerase chain reaction - quantitative, Precipitation, Purification, RNA purification, Transcription

Standard Reverse Transcription Protocol (Two-step)

Reverse transcription (RT) is the process of converting RNA to cDNA using a reverse transcriptase enzyme and dNTPs.
Keywords: Amplification, Polymerase chain reaction, Polymerase chain reaction - quantitative, Transcription

Universal SYBR Green Quantitative PCR Protocol

Technology Overview Assay Considerations Methods of Quantification Equipment & Supplies PCR Mix Selection Guide Protocol Troubleshooting Materials References
Keywords: AGE, Amplification, Buffers, Degradations, Electrophoresis, Enzyme activity, Gas chromatography, Gel electrophoresis, Gene expression, Genetic, Melting, Microarray Analysis, Nucleic acid annealing, Nucleic acid denaturation, Nucleic acid hybridization, Polymerase chain reaction, Polymerase chain reaction - quantitative, Polymorphisms, Purification, Sample preparations, Size-exclusion chromatography, Solvents, Titrations

Related Content

PCR Selection Guide

We offer a wide variety of PCR enzymes, master mixes, and PCR protocols to meet your experimental needs for routine PCR, qPCR, or RT-PCR. Our PCR Selection Guide features various filters to sort by, ...
Keywords: Genomics, Polymerase chain reaction, Polymerase chain reaction - quantitative

RT-PCR | Reverse Transcriptase PCR

RT-PCR, or reverse transcriptase PCR, is a variation of standard PCR technique that involves the amplification of specific mRNA obtained from very small samples. It eliminates the need for the tediou...
Keywords: Amplification, Cloning, Diagnostic, Microbiology, Molecular biology, PAGE, Polymerase chain reaction, Polymerase chain reaction - quantitative, Purification, Transcription, Whole genome amplification

Peer-Reviewed Papers


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