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  • AsiSI

    This enzyme has transitioned to an improved new buffer system. Visit NEBCutSmart.com for further details.
     
    The new and current Double Digest Finder and current Activity/Performance Chart for the CutSmart buffer system are available. The previous version of the Double Digest Finder, as well as the previous Version of Activity/Performance Chart that use the former buffer system, are still available for your convenience.
    cloned at neb recombinant incubation temp heat inactivation cpg
    AsiS-I-cutsite_1_v1_000019
    Catalog #SizeConcentrationPriceQtyAdd to Cart
    R0630S500 units10,000 units/ml$63.00Add to Cart
    R0630L2,500 units10,000 units/ml$252.00Add to Cart
      
    Categories:
    Restriction Endonucleases: A
    Applications:
    Restriction Enzyme Digestion

    Description

    Product Source

    An E. coli strain that carries the cloned AsiSI gene from Arthrobacter species (S.K. Degtyarev).

    Reagents Supplied

    The following reagents are supplied with this product:

    Store at (°C)Concentration
    CutSmart Buffer-2010X

    Properties and Usage

    Unit Definition

    One unit is defined as the amount of enzyme required to digest 1 µg of XhoI digested pXba in 1 hour at 37°C in a total reaction volume of 50 µl.

    Reaction Conditions

    1X CutSmart™ Buffer
    Incubate at 37°C

    1X CutSmart™ Buffer:
    50 mM Potassium Acetate
    20 mM Tris-acetate
    10 mM Magnesium Acetate
    100 μg/ml BSA
    pH 7.9 @ 25°C

    Activity in NEBuffers

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

    Diluent Compatibility

    Storage Conditions

    10 mM Tris-HCl
    300 mM NaCl
    1 mM DTT
    0.1 mM EDTA
    500 μg/ml BSA
    50% Glycerol
    pH 7.4 @ 25°C

    Heat Inactivation

    80°C for 20 min

    Methylation Sensitivity

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

    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.

    Notes

    1. AsiSI is an isoschizomer of SgfI.
    2. Not blocked by dam methylation. Cleavage of mammalian genomic DNA is blocked by CpG methylation.
    3. Star activity may result from extended digestion

    Supporting Documents

    Certificate of Analysis

    The Certificate of Analysis (COA) is a signed document that includes the storage temperature, expiration date and quality control's for an individual lot. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]_[Lot Number]

    Specifications

    The Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]

    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.

    Datacards

    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. What is Star Activity and how can it be avoided?
    2. My enzyme is no longer Time-Saver™ qualified. What happened?
    3. What effect does BSA have on the performance of NEB’s restriction enzymes when included in the new buffers?
    4. How can I access the old NEBuffer Activity Chart?
    5. How can I access the old Double Digest Finder?
    1. Optimizing Restriction Endonuclease Reactions

    Selection Tools

    Usage Guidelines & Tips

    Troubleshooting Guides

    Interactive Tools