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Restriction Endonucleases >
Restriction Endonucleases >
BsmAI |
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Prices are in US dollars and valid only for US orders.
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Recognition Site:
isoschizomers | compatible ends | single letter code
Source:
An E. coli strain that carries the cloned BsmAI gene from Bacillus stearothermophilus A664 (Z. Chen)
Reagents Supplied:
NEBuffer 4 (10X)
Enzyme Properties
Activity in NEBuffers:
| NEBuffer 1: | | 50% | | NEBuffer 2: | | 100% | | NEBuffer 3: | | 100% | | NEBuffer 4: | | 100% |
When using a buffer other than the optimal (supplied) NEBuffer, it may be necessary to add more enzyme to achieve complete digestion.
Methylation Sensitivity:
| dam methylation: Not sensitive | | dcm methylation: Not sensitive | | CpG methylation: Blocked by some combinations of overlapping | |
More information about: Methylation Sensitivity |
Activity at 37°C:
50%
Heat Inactivation:
80°C for 20 minutes
Survival in a Reaction:
(+ +) Intermediate activity. Suitable for extended digestion, but < 8 hours.
More information about: Extended Digests with Restriction Enzymes
Reaction & Storage Conditions
Reaction Conditions:
1X NEBuffer 4
Incubate at
55°C.
1X NEBuffer 4:
20 mM Tris-acetate
50 mM potassium acetate
10 mM Magnesium Acetate
1 mM Dithiothreitol
pH 7.9 @ 25°C
Unit Definition:
One unit is defined as the amount of enzyme required to digest 1 µg of λ DNA in 1 hour at 55°C in a total reaction volume of 50 µl.
Concentration:
5,000 units/ml
Unit Assay Substrate:
λ DNA
Storage Conditions:
10 mM Tris-HCl
300 mM NaCl
1 mM Dithiothreitol
0.1 mM EDTA
500 µg/ml BSA
50% Glycerol
pH 7.4 @ 25°C
Storage Temperature:
-20°C
Diluent Compatibility:
Diluent B
Notes
General notes:- BsmAI is an isoschizomer of Alw26I.
- Incubation at 37°C results in 50% activity and at 65°C results in 10% activity.
- Freshly diluted 10X NEBuffer is recommended for best results, as the enzyme is dependent of fresh DTT.
FAQs
- Why isn't BsmAI working?
- The NEB catalog has historically stated that activity in NEBuffer 4 is less than 100% yet this enzyme is now supplied with NEBuffer 4. What have you changed?
- Has the conversion to NEBuffer 4 altered any of the properties of the restriction enzyme?
- If I have an old tube of enzyme, what NEBuffer should I use?
- Will the new enzyme work in the originally supplied NEBuffer?
- Why is NEB switching this restriction enzyme to NEBuffer 4?
- Does BsmAI replace an enzyme previously sold?
- Is BsmAI blocked by CpG methylation?
- What is the activity level of BsmAI at 37°C?
- Does BsmAI exhibit reduced activity on supercoiled DNA?
- Is overnight digestion with BsmAI recommended?
Quality Control for Current Lot
Quality control values for a specific lot can be found on the datacard which accompanies each product.
Ligation and Re-cutting:
After a 10-fold overdigestion with BsmAI, > 95%
of the DNA fragments can be ligated with T4 DNA Ligase (at a 5' termini concentration of 1-2 μM)
at 16ºC. Of these ligated fragments, > 95% can be recut with BsmAI.
16-Hour Incubation:
A 50 μl reaction containing 1 μg of DNA
and 10 units of BsmAI incubated for 16 hours at 55ºC
resulted in a DNA pattern free of detectable nuclease degradation as determined by agarose gel electrophoresis.
Exonuclease Activity:
Incubation of a 50 μl reaction containing 200 units of BsmAI with 1 μg of a mixture of single and double-stranded
[3H] E. coli DNA (205 cpm/μg) for 4 hours at 55ºC
released < 0.1% of the total radioactivity.
Reagents Sold Separately
NEBuffer 4
Legal
Patents:
New England Biolabs, Inc. : U.S. Patent No. 6,596,524
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New
England Biolabs, Inc. is an ISO 9001 and ISO
14001 Certified Company.
NEB certifies that it is a small business in accordance with the US Small Business Administration and 13 CFR 121.201 |
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