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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Isolation of restriction enzyme EcoVIII, an isoschizomer of HindIII, produced by Escherichia coli E1585-68.

A restriction endonuclease designated EcoVIII, an isoschizomer of HindIII, was isolated from Escherichia coli E1585-68 and purified by dextran-polyethylene glycol (DPG) phase partition, ammonium sulfate precipitation, phospho- and DEAE-cellulose chromatography, and hydroxylapatite chromatography. The purified EcoVIII was stable during the purification procedure and its high specific activity required 10 mM Mg2+. Unlike HindIII, EcoVIII exhibited a high specific activity even at low pH (pH 6.3) and showed the highest activity at 48 degrees C. Transformation of purified plasmid DNA from E. coli E1585-68 into K-12 indicated that the EcoVIII gene was carried on a multicopy 4.4-kb miniplasmid. EcoVIII seems to be preferable to HindIII for its production and use because of easier handling of producer cells and a wider range of activity.[1]

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