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GelRed® Agarose LE

GelRed® Agarose LE is  pre-coated with GelRed® Nucleic Acid Gel Stain for simple preparation of precast gels. With no need to handle concentrated fluorescent dye while preparing your gel, GelRed® Agarose offers greater convenience and safety.

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Product Description

GelRed® Agarose LE is our ultra-pure molecular biology grade LE agarose pre-coated with GelRed® Nucleic Acid Gel Stain. With GelRed® Agarose, there is no need to handle concentrated fluorescent dye while preparing your gel, for greater convenience and safety.

  • Non-toxic GelRed® DNA/RNA dye is already in the agarose
  • No need to handle concentrated dye solutions, for enhanced safety
  • Use with TAE or TBE for 0.8% to 2% gels
  • Low EEO, ultrapure molecular biology grade agarose

GelRed® Agarose LE has low electroendosmosis (EEO) for high electrophoretic mobility. This agarose has excellent performance for analytical or preparative nucleic acid electrophoresis and blotting. It is suitable for preparing 0.8%-2% gels in TAE or TBE buffer. In a 1% GelRed® Agarose gel, the final GelRed® concentration is 1X, just like in our standard precast protocol. GelRed® Agarose also gives excellent results at percentages between 0.8% (0.8X GelRed®) up to 2% (2X GelRed®).

GelRed® and EtBr have virtually the same spectra, so you can directly replace EtBr with GelRed® without changing your existing imaging system. In addition, GelRed® is far more sensitive than EtBr. GelRed® can be used to stain dsDNA, ssDNA or RNA, however GelRed® is twice as sensitive for double-stranded than single-stranded nucleic acids. Gel staining with GelRed® is compatible with downstream applications such as sequencing and cloning. GelRed® can be removed from DNA using a gel extraction kit, or by phenol/chloroform extraction followed by ethanol precipitation. To learn more, see the GelRed® technology page, or GelRed® FAQs (below).

GelRed® was subjected to a series of tests at Biotium and by three independent testing services to assess the dye’s safety for routine handling and disposal. Test results confirm that the dye is impenetrable to both latex gloves and cell membranes. The dye is non-cytotoxic and non-mutagenic at concentrations well above the working concentrations used in gel staining. Using GelRed® Agarose further minimizes risk by avoiding the need to handle concentrated dye solution. GelRed® successfully passed environmental safety tests in compliance with CCR Title 22 Hazardous Waste Characterization, under which GelRed® is classified as non-hazardous waste. See the GelRed® and GelGreen® Safety Report.

We also offer GelGreen® Agarose LE and unlabeled Agarose LE, Ultrapure Molecular Biology Grade.

 

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Support & Faq

GelRed® and GelGreen® Nucleic Acid Gel Stains

The main difference between GelRed® and GelGreen® is their fluorescence excitation and emission wavelengths. GelRed® has red fluorescence, similar to ethidium bromide. GelGreen® has green fluorescence, similar to SYBR® Green or SYBR® Safe. Both dyes are compatible with standard UV transilluminators. GelGreen® is also compatible with blue light transilluminators, which allow users to avoid exposing themselves and their DNA samples to ultraviolet radiation.

GelRed® and GelGreen® have higher sensitivity for double stranded nucleic acids compared to single stranded nucleic acids, but GelRed® is more sensitive for staining single stranded nucleic acids than GelGreen®. GelRed® is about twice as sensitive for double stranded nucleic acids compared to single-stranded nucleic acids, and about five times more sensitive than GelGreen® for staining single stranded nucleic acids.

For more information about these products, please visit our DNA stains technology page.

View the GelRed® Product Line

View the GelGreen® Product Line

Category: GelRed® and GelGreen® Nucleic Acid Gel Stains

← FAQs

The water formulation is a newer and improved product compared to the stock in DMSO. We recommend using dyes in water to avoid the potential hazards of handling DMSO, which can be absorbed through the skin. We continue to offer dyes in DMSO because some users do not wish to alter their established laboratory protocols. Based on internal testing, both formulations perform similarly.

Category: GelRed® and GelGreen® Nucleic Acid Gel Stains

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GelRed® is compatible with a standard UV transilluminator (302 or 312 nm).
GelGreen® has sufficient absorption between 250-300 nm and a strong absorption peak at around 500 nm. GelGreen® is compatible with a 254 nm UV transilluminator or a gel reader with visible light excitation such as a Dark Reader or a 488 nm laser gel scanner.

Category: GelRed® and GelGreen® Nucleic Acid Gel Stains

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GelRed® and GelGreen® troubleshooting

Many customers use GelRed® or GelGreen® precast gels for convenience. However, because GelRed® and GelGreen® are high affinity dyes designed to be larger dyes to improve their safety, they can affect the migration of DNA in precast gels. Some samples, such as restriction digested DNA may migrate abnormally in GelRed® or GelGreen® precast gels.

Tip #1: Load less DNA

Smearing and smiling in GelRed® or GelGreen® precast gels most often caused by overloading of DNA. If you see band migration shifts or smearing and smiling, try reducing the amount of DNA loaded. The recommended loading amount for ladders and samples of known concentration is 50-200 ng/lane. For samples of unknown concentration, try loading one half or one third of the usual amount of DNA. This usually solves band migration problems.

Tip #2: Try the post-staining protocol

To avoid any interference the dye may have on DNA migration, we recommend using the post-staining protocol. If your application requires loading more than the recommended amount of DNA, use the post-staining protocol. While we recommend post-staining gels for 30 minutes, you may be able see bands in as little as five minutes, depending on how much DNA is present. Post-staining solutions can be reused. See the GelRed® Product Information Sheet or GelGreen® Product Information Sheet for detailed protocols.

Other tips to improve agarose gel resolution:

  • If you see DNA migration issues or smearing after post-staining with GelRed® or GelGreen®, then the problem is not caused by the nucleic acid dye. Avoid overfilling gel wells to prevent smearing of DNA down the surface of the gel.
  • Pour a lower percentage agarose gel. Higher molecular weight DNA separates better with a lower percentage gel.
  • Change the running buffer. TBE buffer has a higher buffering capacity than TAE buffer.

Category: GelRed® and GelGreen® troubleshooting, GelRed® and GelGreen® Nucleic Acid Gel Stains

← FAQs

There are a few possibilities:

  1. The dye may have precipitated out of solution.
    • Heat the GelRed® or GelGreen® solution to 45-50°C for two minutes and vortex to dissolve.
    • Store dye at room temperature to avoid precipitation.
  2. If you are seeing high background staining of the gel, the agarose that you are using may be of low quality. Contaminants in the agarose may bind to the dye, resulting in increased background.

Category: GelRed® and GelGreen® troubleshooting, GelRed® and GelGreen® Nucleic Acid Gel Stains

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Shipping/Shelf-life

Shipping & Handling Disclaimer: Shipping and handling methods are calculated based on item temperature storage recommendation. Large, multi-item orders may be assessed additional fees. Shipping to Puerto Rico may be assessed additional fees. A Biotium customer service representative will contact you if additional fees are required. For expedited shipping, please request in the Order Notes section of the checkout page. Please note that products with recommended storage at 4°C or -20°C may ship at ambient temperature. This will not affect product performance. When you receive the product, place it under the recommended storage conditions.