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n. pl. su·per·he·lix·es or su·per·hel·i·ces (hĕl′ĭ-sēz′, hē′lĭ-)
A structure in which a helix is itself coiled into a helix, as in a DNA supercoil.

su′per·hel′i·cal (-hĕl′ĭ-kəl, -hē′lĭ-) adj.
su′per·hel′i·cal·ly adv.


of, relating to, or consisting of a superhelix
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References in periodicals archive ?
The primary target of moxifloxacin is DNA gyrase, an essential bacterial enzyme that maintains superhelical twists in DNA.
The superhelical state of intracellular DNA is regulated by the actions of DNA gyrase and topoisomerase I, which removes DNA super helical twists but is not inhibited by quinolones.
The cap-helix domain forms a 42-turn [alpha] helix that exhibits a superhelical structure with a quarter turn, and the cap-ring domain at the end of the cap forms a U-shaped structure with helical elements at both ends (Fig.