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  • Title: Purification of Escherichia coli DNA helicase I from plasmid-transformed cells.
    Author: Benz I, Müller H, Abdel-Monem M, Hoffmann-Berling H.
    Journal: Acta Microbiol Pol; 1986; 35(3-4):191-7. PubMed ID: 2436446.
    Abstract:
    DNA helicase I was purified in large quantity from Escherichia coli cells harboring a plasmid that carries the gene encoding helicase I--the traI gene of the F sex factor--cloned in a high copy number vector. Electron microscopic studies on the purified material reveal new properties of the enzyme protein.
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