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D4309 Sigma-Aldrich

REDTaq® DNA Polymerase

Taq for routine PCR with inert dye, 10X buffer included



Related Categories Application Index, Biochemicals and Reagents, Core Bioreagents, Enzymes, Inhibitors, and Substrates, Life Science Reagents for PCR,
Quality Level   200
form   liquid
feature   hotstart: no
concentration   1 unit/μL
color   red
Featured Industry   Agriculture
shipped in   wet ice
storage temp.   −20°C


General description

REDTaq DNA Polymerase is a unique blend of Sigma′s quality Taq DNA Polymerase combined with an inert red dye. This dye enables quick visual confirmation of enzyme addition and reaction mixing. An aliquot of the samples (5-10 μl) can then be loaded directly onto an agarose gel for electrophoresis following PCR. The red dye migrates slightly faster than bromophenol blue at about the same rate as a 125 base pair fragment in a 1% agarose gel. Since no additional loading buffers are added to the reaction following PCR, reamplification is possible.
The red dye has no effect on automated or manual sequencing, restriction digestions or other downstream applications. However, if removing the dye is desired, this can easily be accomplished using any standard purification method.


For routine PCR amplifications REDTaq® DNA Polymerase has been used in polymerase chain reaction(83} and reverse transcription-polymerase chain reaction (RT-PCR) analysis.

Features and Benefits

• Same great performance as Taq DNA Polymerase in a more convenient format for high throughput applications.
• Visual confirmation that not only has the enzyme been added, but that proper mixing has occurred.
• No additional loading dyes are necessary. An aliquot can be taken directly from the reaction and loaded onto an agarose gel for electrophoresis.


Provided with 10X reaction buffer containing MgCl2

Unit Definition

One unit incorporates 10 nmol of total dNTPs into acid-precipitable DNA in 30 min at 74 °C.

Legal Information

Use of this product is covered by one or more of the following US patents and corresponding patent claims outside the US: US 8,404,464 and US 7,972,828. The purchase of this product includes a limited, non-transferable immunity from suit under the foregoing patent claims.

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

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Single- & multi-channel pipettes from BRAND
Protocols & Articles


History of PCR Discoveries - 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: Amplification, Clinical, Degradations, Detection methods, Diagnostic, Diseases, Forensic, Gene expression, Genetic, Molecular biology, Nucleic acid denaturation, PAGE, Polymerase chain reaction, Polymerase chain reaction - quantitative, Purification, Separation, Transcription

Improving Real-Time PCR Success

To meet increasing food supply demands of the global population, growers require seeds that can withstand the regional challenges found in their fields. In order to develop crop varieties that are mo...
Keywords: Agriculture, Amplification, Environmental, Polymerase chain reaction


Applications with REDTaq

Since its introduction, REDTaq has been well received by the scientific community. The original product idea was to add convenience to PCR by formulating a reaction that also contained loading buffer...
by Brian Ward and Keming Song
Sigma-Aldrich Corporation, St. Louis, MO, USA
Keywords: Amplification, Applications, Error, Melting, Methods, Nucleic acid annealing, Peptide synthesis, Polymerase chain reaction, Purification, Sequencing, transformation

PCR Protocol | Standard PCR Protocol

These steps are presented below in greater detail along with materials and reagent selection tips. This is a basic PCR protocol using Taq DNA polymerase.
Keywords: AGE, Amplification, Electrophoresis, Evaporation, Gel electrophoresis, PAGE, Polymerase chain reaction, Sequencing

Related Content

Agriculture | Genotyping

Sigma-Aldrich’s chemistry expertise can help customers develop and optimize their leaf and seed genotyping workflow to reduce cost per data point while increasing throughput rates. In addition, our g...
Keywords: Amplification, Polymerase chain reaction, Polymerase chain reaction - quantitative, Sequencing, Whole genome amplification

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

Plant Breeding Workflow - Collaborating to Empower Yield Improvements

Sigma-Aldrich products are aligned to the discovery, development and production phases of the plant breeding workflow, allowing you to develop and produce new crop varieties faster. With materials ma...
Keywords: Building blocks, Mass spectrometry, Organic synthesis, Polymerase chain reaction, Polymerase chain reaction - quantitative, Vitamins

Peer-Reviewed Papers


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