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SpeI-HF®

Catalog # Concentration Size List Price Quantity Your Price
R3133L 20000 units/ml 2500 units $480.00
$432.00
R3133M 100000 units/ml 2500 units $480.00
$432.00
R3133S 20000 units/ml 500 units $116.00
$104.40
Catalog # Size List Price Your Price
R3133L 2500 units $480.00
$432.00
R3133M 2500 units $480.00
$432.00
R3133S 500 units $116.00
$104.40
Catalog #
Qty:
 
*On-line ordering is for Canadian customers only. Web pricing is applicable only to orders placed online at www.neb.ca

High-Fidelity (HF®) restriction enzymes have the same specificity as native enzymes, but have been engineered for significantly reduced star activity and performance in a single buffer (rCutSmart™ Buffer).  All HF-restriction enzymes come with Gel Loading Dye, Purple (6X).  Enjoy the enhanced performance and added value of our engineered enzymes at the same price as the native enzyme:

  • Engineered for improved performance
  • 100% activity in rCutSmart Buffer
  • Time-Saver™ qualified for digestion in 5-15 minutes
  • Reduced star activity
  • Supplied with 1 vial of Gel Loading Dye, Purple (6X)
  • Restriction Enzyme Cut Site: A/CTAGT
Featured Videos
View Video Library
  • Monarch_MiniprepProtocol_VideoThumb
    Reduce Star Activity with High-Fidelity Restriction Enzymes
  • Monarch_MiniprepProtocol_VideoThumb
    TIME-SAVER™ Protocol for Restriction Enzyme Digests
  • Monarch_MiniprepProtocol_VideoThumb
    NEB® TV Ep. 15 – Applications of Restriction Enzymes
  • Monarch_MiniprepProtocol_VideoThumb
    Restriction Enzyme Digest Protocol: Cutting Close to DNA End
  • Monarch_MiniprepProtocol_VideoThumb
    Restriction Enzyme Digestion Problem: DNA Smear on Agarose Gel
  • Monarch_MiniprepProtocol_VideoThumb
    Why is My Restriction Enzyme Not Cutting DNA?
  • Monarch_MiniprepProtocol_VideoThumb
    Restriction Enzyme Digest Problem: Too Many DNA Bands
  • Monarch_MiniprepProtocol_VideoThumb
    Double Digestion with NEBcloner
High Fidelity (HF) Restriction Enzymes have 100% activity in rCutSmart Buffer; single-buffer simplicity means more straightforward and streamlined sample processing. HF enzymes also exhibit dramatically reduced star activity. HF enzymes are all Time-Saver qualified and can therefore cut substrate DNA in 5-15 with the flexibility to digest overnight without degradation to DNA. Engineered with performance in mind, HF restriction enzymes are fully active under a broader range of conditions, minimizing off-target products, while offering flexibility in experimental design.

NEB extensively performs quality controls on all standard and high-fidelity (HF) restriction enzymes. Examples of nuclease contamination studies for some of our HF restriction enzymes are shown below.

Restriction Enzyme Competitor Study: Nuclease Contamination


EcoRI, NotI, and BamHI from multiple suppliers were tested in reactions containing a fluorescent labeled single stranded, double stranded blunt, 3’overhang or 5’ overhang containing oligonucleotides. The percent degradation is determined by capillary electrophoresis and peak analysis. The resolution is at the single nucleotide level.
Product Source
An E. coli strain that carries the cloned and modified SpeI gene from Sphaerotilus species (ATCC 13923)
Reagents Supplied

The following reagents are supplied with this product:

NEB # Component Name Component # Stored at (°C) Amount Concentration
  SpeI-HF® R3133SVIAL -20 1 x 0.025 ml 20,000 units/ml
  rCutSmart™ Buffer B6004SVIAL -20 1 x 1.25 ml 10 X
  Gel Loading Dye, Purple (6X) B7024AVIAL 25 1 x 0.5 ml 6 X
  SpeI-HF® R3133LVIAL -20 1 x 0.125 ml 20,000 units/ml
  rCutSmart™ Buffer B6004SVIAL -20 1 x 1.25 ml 10 X
  Gel Loading Dye, Purple (6X) B7024AVIAL 25 1 x 0.5 ml 6 X
  SpeI-HF® R3133MVIAL -20 1 x 0.025 ml 100,000 units/ml
  rCutSmart™ Buffer B6004SVIAL -20 1 x 1.25 ml 10 X
  Gel Loading Dye, Purple (6X) B7024AVIAL 25 1 x 0.5 ml 6 X
SpeI-HF® | New England Biolabs

SpeI-HF®
neb31 cloned at NEB recombinant engineered time saver dil_C 37 80 Heat

SpeI-HF has been reformulated, and now also includes Recombinant Albumin (rAlbumin), beginning with Lot https://www.neb.com/en/#10192521. Learn more.

We are excited to announce that all reaction buffers are now BSA-free. NEB began switching our BSA-containing reaction buffers in April 2021 to buffers containing Recombinant Albumin (rAlbumin) for restriction enzymes and some DNA modifying enzymes. Find more details at www.neb.com/BSA-free.

NEB high fidelity restriction endonuclease that recognizes the sequence A^CTAGT
Isoschizomers | Single Letter Code | Pronunciation:

High-Fidelity (HF®) restriction enzymes have the same specificity as native enzymes, but have been engineered for significantly reduced star activity and performance in a single buffer (rCutSmart™ Buffer).  All HF-restriction enzymes come with Gel Loading Dye, Purple (6X).  Enjoy the enhanced performance and added value of our engineered enzymes at the same price as the native enzyme:

  • Engineered for improved performance
  • 100% activity in rCutSmart Buffer
  • Time-Saver™ qualified for digestion in 5-15 minutes
  • Reduced star activity
  • Supplied with 1 vial of Gel Loading Dye, Purple (6X)
  • Restriction Enzyme Cut Site: A/CTAGT

Featured Video

Catalog https://www.neb.com/en/# Concentration Size
R3133S 20,000 units/ml 500 units
R3133L 20,000 units/ml 2,500 units
R3133M 100,000 units/ml 2,500 units
Please enter a quantity for at least one size

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Companion Products
Materials Sold Separately
Notes
  • Cleaves to leave a 5´ CTAG extension which can be efficiently ligated to DNA fragments generated by AvrII, NheI, or XbaI.
  • Not sensitive to CpG, dcm, or dam methylation.
FAQs
Troubleshooting
Quality Control Assay
Quality Control tests are performed on each new lot of NEB product to meet the specifications designated for it. Specifications and individual lot data from the tests that are performed for this particular product can be found and downloaded on the Product Specification Sheet, Certificate of Analysis, data card or product manual. Further information regarding NEB product quality can be found here.
Change Notifications
SpeI-HF has been reformulated and now also contains Recombinant Albumin (rAlbumin) beginning with Lot #10192521. All subsequent (higher number) lots will contain rAlbumin. For additional information, please visit at NEB Restriction Enzyme formulations with Recombinant Albumin (rAlbumin).
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]
Certificate of Analysis
The Certificate of Analysis (COA) is a signed document that includes the storage temperature, expiration date and quality controls for an individual lot. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]_[Lot Number]
Safety Data Sheets
Legal And Disclaimer

Products and content are covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB). The use of trademark symbols does not necessarily indicate that the name is trademarked in the country where it is being read; it indicates where the content was originally developed. The use of this product may require the buyer to obtain additional third-party intellectual property rights for certain applications. For more information, please email busdev@neb.com.

This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.

New England Biolabs (NEB) is committed to practicing ethical science – we believe it is our job as researchers to ask the important questions that when answered will help preserve our quality of life and the world that we live in. However, this research should always be done in safe and ethical manner. Learn more.

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