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  • TriDye™ 100 bp DNA Ladder


    TriDye™ 100 bp DNA Ladder is a pre-mixed, ready-to-load molecular weight marker containing 3 dyes which serve as visual aids to monitor the progress of migration during agarose gel electrophoresis.

    The DNA ladder consists of proprietary plasmids are digested to completion with appropriate restriction enzymes to yield 12 bands suitable for use as molecular weight standards for agarose gel electrophoresis. The digested DNA includes fragments ranging from 100-1,517 base pairs. The 500 and 1,000 base pair bands have increased intensity to serve as reference points.

    TriDye During Electrophoresis: On a standard 1% agarose gel in 1X TBE, xylene cyanol FF migrates at approximately 4 kb, bromophenol blue at approximately 300 bp and the orange G at approximately 50 bp. As the percentage of agarose changes, the migration rates of the dyes relative to migration rates of the DNA will change.


    100 bp DNA Ladder visualized by ethidium bromide staining on a 1.3% TAE agarose gel. Mass values are for 0.5 µg/lane

    Properties and Usage



    Effective Size Range

    100bp to 1,517bp

    Storage Temperature


    Storage Conditions

    0.006% Xylene Cyanol
    10 mM Tris-HCl
    10 mM EDTA
    10% Glycerol
    0.006% bromophenol blue
    0.06% Orange G
    pH 7.9 @ 25°C


    1. The TriDye DNA Ladder was not designed for precise quantification of DNA mass but can be used for approximating the mass of DNA in comparably intense samples of similar size.
    2. We recommend loading 10 μl (0.5 μg) of TriDye DNA Ladder per gel lane.
    3. In general, it is recommended to load 1ul per mm of gel lane.
    4. TriDye DNA Ladder is stable for at least 6 months at 25°C
    5. For long term storage, store at 4°C or -20°C. If stored at -20°C, mix well after thawing.


    1. Sambrook, J., Fritsch, E.F. and Maniatis, T. (1989). Molecular Cloning: A Laboratory Manual (2nd Ed.). 10.51-10.67.

    Supporting Documents

    Material Safety Datasheets

    The following is a list of Material Safety Data Sheets (MSDS) that apply to this product to help you use it safely. The following file naming structure is used to name these document files: [Product Name] MSDS. For international versions please contact us at info@neb.com.


    The Product Summary Sheet, or Data Card, includes details for how to use the product, as well as details of its formulation and quality controls. The following file naming structure is used to name the majority of these document files: [Catalog Number]Datasheet-Lot[Lot Number]. For those product lots not listed below, please contact NEB at info@neb.com or fill out the Technical Support Form for appropriate document.
    1. Why are the DNA ladders showing up on my Southern blot? What is the sequence or composition of the ladder bands?
    2. How can I quantify the amount of DNA in each band of a marker?
    3. Why are there extra bands visible on polyacrylamide gels?
    4. What are the differences in the three versions of 2-Log, 100 bp and 1 kb DNA Ladders that NEB sells?
    5. Can I use GelRed with the DNA Ladders from NEB?
    6. Can I use SYBR® with the DNA Ladders from NEB?
    7. Can I use Midori Green with the DNA Ladders from NEB?

    Selection Tools

    Mix well before use, especially after thawing.