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- W1993722277 abstract "A DNA-relaxing enzyme which catalyzes the conversion of superhelical DNA to a non-superhelical covalently closed form has been purified from Micrococcus luteus to near homogeneity by two chromatographic steps. The enzyme is a single polypeptide chain. As determined by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and gel filtration on Sephadex G 150, the molecular weight is 115,000. The DNA-relaxing activity determined as a function of enzylile concentration follows a sigmoidal The enzyme requires Mg++ for activity. In the presence of 4.5 mM Mg++ addition of 50–250 mM KC1 yields incompletely relaxed DNA molecules (intermediates); intermediates are also observed in the absence of KC1, when the reaction is carried out at 0°C or at Mg++ concentrations exceeding 10 mM." @default.
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- W1993722277 date "1977-01-01" @default.
- W1993722277 modified "2023-09-26" @default.
- W1993722277 title "DNA-relaxing enzyme from Micrococcus luteus" @default.
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- W1993722277 doi "https://doi.org/10.1093/nar/4.12.4235" @default.
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