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DNA
Topoisomerase
Key terms: dna lk math number supercoiling twist bp sum molecule writhe relaxed negative then l cell helix adn rna ends change helical toroid fiber lobes delta shape segment plasmid positive either structure complex linking number strands circular dna chromosome topology equation proteins number of turns supercoiled dna packaging dna supercoiling dna duplex turns in the relaxed negative supercoiling negatively supercoiled Search external links cited by footnotes on Wikipedia page DNA supercoil: |
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