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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.


n, pl -helices (-ˈhɛlɪˌsiːz) or -helixes
(Biochemistry) biochem a molecular structure in which a helix is coiled into a higher-order helix


(ˈsu pərˌkɔɪl)

a twist formed by intertwining strands of DNA or by protein chains.
su′per•coiled`, adj.
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References in periodicals archive ?
Besides, ARM-repeat units tandem fold together forming a superhelix that provides a versatile platform for interacting with other protein partners (Coates, 2003; Liu et al.
Tropomyosin is a long protein (~40 nm) with two [alpha]-helical polypeptide chains that form a coiled coil in a parallel orientation by winding around each other in a left-handed superhelix.
Three of these helical strands then twist around on one another, like the strands of a rope, in a right-handed superhelix, to make up the complete molecule.