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Supercoil


Supercoiled DNA
The B form of the DNA helix twists 360 per 10.6 bp in the absence of strain. But many molecular biological processes can induce strain.
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Supercoiled DNA
Double-stranded circular DNA in which either overwinding or underwinding of the duplex makes the circle twist.
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Supercoiled DNA
Main article: Supercoil
The B form of the DNA helix twists 360° per 10 bp in the absence of strain. But many molecular biological processes can induce strain.
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Supercoiled plasmid. The predominant in vivo form of plasmid, in which the plasmid is coiled around histone-like proteins.
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Supercoil: Double-stranded circular DNA which is twisted about itself. Commonly observed with plasmids and circular viral DNA genomes (such as that of hepatitis B virus).
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The supercoiled arrangement of DNA in eukaryotic nuclear chromosomes produced by coiling the continuous string of nucleosomes (about 7 nucleosomes per turn).
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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This relaxes the torsional strain needed to maintain supercoiling, producing the familiar form of plasmid. (See Plasmid.) NIH. See National Institutes of Health. Nitrocellulose.
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Less than one picogram of linear or supercoiled DNA is analyzed in under 3 minutes. Sizing range has been extended down to 287 base pairs. Efforts continue to extend the upper limit beyond 167,000 bases.
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-tomy cut topoisomerases Enzymes that introduce positive or negative supercoils in closed, circular duplex DNA. toxins Proteins produced by some organisms and toxic to some other species.
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