|Source||An E.coli strain, that carries the cloned gene Hpa I from Haemophilus parainfluenzae|
|Assayed on||Lambda DNA|
|Unit definition||One unit of the enzyme is the amount required to hydrolyze 1 μg of Lambda DNA in 1 hour at 37°C in a total reaction volume of 50 μl.|
|Optimal SE-buffer||Y (33 mM Tris-acetate (pH 7.9 at 25°C); 10 mM magnesium acetate; 66 mM potassium acetate; 1 mM DTT.)|
|Enzyme activity (%)|
|0 - 10||50 - 75||10 - 25||25 - 50||100||25|
|Storage conditions||10 mM Tris-HCl (pH 7.5); 50 mM NaCl; 0.1 mM EDTA; 1 mM DTT; 200 μg/ml BSA; 50% glycerol. Store at -20°C.|
|Ligation||After 5-fold overdigestion with enzyme about 60% of the DNA fragments can be ligated and recut.|
|Non-specific hydrolisis||No nonspecific activity was detected after incubation of 1 μg of Lambda DNA with 5 u.a. of enzyme for 16 hours at 37°C.
|Reagents Supplied with Enzyme||
10 X SE-buffer Y.|
|Methylation sensitivity||not tested|
|Inactivation 20 minutes under||65oC|
|Notes||High enzyme concentration results in star activity.
|Quality control||Restriction Endonucleases: Quality Control|
|MSDS:||Download MSDS as PDF|
|References:||Sharp, P.A., Sugden, B., Sambrook, J. Biochemistry 12: 3055-3063 (1973).
Garfin, D.E., Goodman, H.M. Biochem. Biophys. Res. Commun. 59: 108-116 (1974).|
|Theoretical diagrams of DNA digestion by this enzyme for the most known DNA substrates:|
To view the fragments length values please point mouse cursor over diagram
M - ladder, 1 - Adeno-2 DNA, 2 - Lambda DNA, 3 - T7 DNA, 4 - pUC19, 5 - pBR322