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XB-ART-32572
Proc Natl Acad Sci U S A 1976 Feb 01;732:554-8.
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Effect of Xenopus laevis oocyte extract on supercoiled simian virus 40 DNA: formation of complex DNA.

Gandini Attardi D , Martini G , Mattoccia E , Tocchini-Valentini GP .


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A soluble cell-free extract derived from stage 6 Xenopus laevis oocytes is described. From supercoiled simian virus 40 DNA the extract produces nicked circles (having a single-strand scission), linear molecules of full unit size, shorter length fragments, and various forms of complex DNA.

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References [+] :
Francke, In vitro polyoma DNA synthesis: requirement for cytoplasmic factors. 1975, Pubmed