DNA超らせん
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↑ Valenti A, Perugino G, Rossi M, Ciaramella M (2011). “Positive supercoiling in thermophiles and mesophiles: of the good and evil”. Biochem. Soc. Trans. 39 (1): 58-63. PMID 21265747.
↑ Liu LF, Wang JC (1987). “Supercoiling of the DNA template during transcription”. Proc. Natl. Acad. Sci. USA. 84 (20): 7024-7027. PMID 2823250.
↑ Postow L, Crisona NJ, Peter BJ, Hardy CD, Cozzarelli NR (2001). “Topological challenges to DNA replication: conformations at the fork”. Proc. Natl. Acad. Sci. USA. 98 (15): 8219-8226.