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supercoiling
(redirected from Supercoil)

    Also found in: Medical, Wikipedia 0.01 sec.
supercoiling [′sü·pər‚kȯil·iŋ]
(cell and molecular biology)
Winding of the deoxyribonucleic acid duplex on itself so that it crosses its own axis; may be in the same (positive) direction as, or opposite (negative) direction to, the turns of the double helix.
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In fact, the DNA supercoil is a carefully articulated knot that ties itself up according to rules governing its geometry and electrical forces acting on it from the liquid surroundings.
Salts add tightness to DNA supercoils by Lipkin, Richard / Science News
That nature repeatedly creates materials that twist and supercoil -- from tiny proteins and DNA to the yarns, ropes, and cables spun from natural filaments -- suggests that some fundamental process may affect how these diverse structures form.
Mendelson's web: a microbiologist spins a tale of mutant bacteria by Lipkin, Richard / Science News
The protein structure, called the histone octamer, organizes DNA into supercoils to keep genes compact and untangled.
Rugby ball at the chromosome core by Science News
 
 
 
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