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Restriction Endonucleases >
Restriction Endonucleases >
BspMI |
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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:
A E. coli strain that carries the BspMI gene from Bacillus species M (R. Morgan).
Reagents Supplied:
NEBuffer 3 (10X)
Enzyme Properties
Activity in NEBuffers:
| NEBuffer 1: | | Not Recommended | | NEBuffer 2: | | Not Recommended | | NEBuffer 3: | | 100% | | NEBuffer 4: | | Not Recommended |
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: Not sensitive | |
More information about: Methylation Sensitivity |
Heat Inactivation:
65°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 3
Incubate at
37°C.
1X NEBuffer 3:
50 mM Tris-HCl
100 mM NaCl
10 mM MgCl2
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 37°C in a total reaction volume of 50 µl.
Concentration:
2,000 units/ml
Unit Assay Substrate:
λ DNA
Storage Conditions:
10 mM Tris-HCl
500 mM KCl
1 mM Dithiothreitol
0.1 mM EDTA
200 µg/ml BSA
50% Glycerol
pH 7.4 @ 25°C
Storage Temperature:
-20°C
Diluent Compatibility:
Diluent B
Notes
General notes:- BfuAI is an isoschizomer of BspMI.
- Sites in some plasmid DNAs that are resistant to cleavage by BspMI may be cleaved by BfuAI.
- BspMI requires two copies of its recognition sequence for cleavage to occur. Thus, the single BspMI sites in pBR322 and pUC18 and 19 are resistant to cleavage. A 100-fold overdigestion cuts less than half of the DNA.
- When more than 8 units are incubated overnight star activity appears to cleave the sequence ACCTGT at a rate of 100-1,000-fold slower than ACCTGC.
- Overnight digestion with this enzyme may result in star activity and is not recommended.
FAQs
- What is Star Activity and how can it be avoided?
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 BspMI, > 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 BspMI.
16-Hour Incubation:
A 50 μl reaction containing 1 μg of DNA
and 2 units of BspMI incubated for 16 hours at 37ºC
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 100 units of BspMI with 1 μg of a mixture of single and double-stranded
[3H] E. coli DNA (205 cpm/μg) for 4 hours at 37ºC
released < 0.1% of the total radioactivity.
Reagents Sold Separately
NEBuffer 3
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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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