| Recognition site | GTT↑AAC
CAA↓TTG |
| Source | 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 (%) | | B | G | O | W | Y | R | | 0 - 10 | 50 - 75 | 10 - 25 | 25 - 50 | 100 | 25 |
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| Optimal temperature | 37oC |
| 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. |
| Ligations | 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.
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| 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. |
| 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).
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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
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