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  • TliI


    Product Source

    An E. coli strain that carries the TliI gene from Thermococcus litoralis (H.W. Jannasch).

    Reagents Supplied

    The following reagents are supplied with this product:

    Store at (°C)Concentration
    NEBuffer 3-2010X
    BSA-2010 mg/ml

    Properties and Usage

    Unit Definition

    One unit is defined as the amount of enzyme required to digest 1 µg of λ DNA (HindIII digest) in 1 hour at 75°C in a total reaction volume of 50 µl.

    Reaction Conditions

    1X NEBuffer 3
    Supplement with BSA
    Incubate at 75°C

    1X NEBuffer 3:
    100 mM NaCl
    50 mM Tris-HCl
    10 mM MgCl2
    1 mM DTT
    pH 7.9 @ 25°C

    Usage Concentration


    Activity in NEBuffers

    NEBuffer 1.1: 10%
    NEBuffer 2.1: 50%
    NEBuffer 3.1: 100%
    CutSmart™ Buffer: 50%

    Diluent Compatibility

    Storage Temperature


    Storage Conditions

    25 mM Tris-HCl
    300 mM NaCl
    1 mM DTT
    0.1 mM EDTA
    200 μg/ml BSA
    50% Glycerol
    pH 7.9 @ 25°C

    Heat Inactivation


    Methylation Sensitivity

    dam methylation: Not Sensitive
    dcm methylation: Not Sensitive
    CpG Methylation: Impaired

    Activity at Temperature

    @37°C: 10%

    Quality Control

    Quality Control Assays

    The following Quality Control Tests are performed on each new lot and meet the specifications designated for the product. Individual lot data can be found on the Product Summary Sheet/Datacard or Manual which can be found in the Supporting Documents section of this page.
    • Exonuclease Activity (Radioactivity Release):
      The product is tested in a reaction containing a radiolabeled mixture of single and double-stranded DNA. After incubation for 4 hours the exonuclease activity is determined by the % release of radioactive nucleotides.
    • Ligation and Recutting (Terminal Integrity):
      After an over-digestion of DNA with a restriction endonuclease the percentage of the DNA fragments ligated with T4 DNA ligase and the percentage that can be recut are determined by agarose gel electrophoresis.


    1. TliI is a highly thermostable isoschizomer of XhoI.
    2. Incubations of longer than 2 hours are not recommended because of the 75°C optimal incubation temperature.

    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. Is TliI activity sensitive to dam, dcm or mammalian CpG methylation?
    2. How many base pairs should be added at the end of a PCR primer next to the TliI recognition site to guarantee that TliI will cut properly?
    3. Does TliI have any isoschizomers/neoschizomers?
    4. What is the activity of TliI at 37°C?
    5. Are there any additional recommendations for the use of TliI?

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