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{{short description|Linear stacking of regular tetrahedra that form helices}} |+ Coxeter helices from regular tetrahedra ...

...[handedness]] into a resin. Care must be exercised to secure isotropy: the helices must be randomly oriented so that there is no special direction.<ref>{{Cite ...

The N terminal region contains two [[alpha helix|alpha helices]] and four [[beta strands]].<ref name="pmid8550549"/> The central region contains two [[alpha helix|alpha helices]] and four [[beta strands]].<ref name="pmid8550549"/> ...

...020-12-08 |language=en-US}}</ref> The secondary structure consists of 17 α-helices which contain 130 residues and 18 β-strands which contain 55 residues as we ...e of the enzyme contains also three random coils which help to connect the helices and strands together.<ref name="Komoto_1987">{{cite journal | vauthors = Ko ...

...ended type of [[pitch space]]. A mathematical model involving concentric [[helices]] (an "array of [[spiral]]s"), it represents human perceptions of [[pitch ( ...mb|Spiral array model: pitch class, major/minor chord, and major/minor key helices]] ...

...eta sheet]] and is covalently bound to FAD. Domain II comprises five alpha helices surrounded by eight beta sheets. Enzymes that share similar amino acid sequ ...n green) is located between domain I and domain II of THCA synthase. Alpha helices are cyan and beta sheets are magenta. ...

...ers differs by family. The Gct family, for example, has extra layers of α helices and β sheets compared to Cat1 and OXCT1 families. ...

*[[Fenske helices]] ...

The N-terminal domain is composed of two amphipathic α-helices (αA – αB) which are responsible for the [[Lipid bilayer|lipid membrane]] in ...

...s [[glutamine]] and W is [[tryptophan]]) that connect numerous surface [[α helices]] tighten the protein structure and prevent denaturing.<ref name=wendt /> [[File:Surface helices.png|thumb|Numerous tightly linked surface helices]] ...

The curves <math>\mathbf S(t=\text{constant},\varphi)</math> are circular helices.<br /> ...

The (identical) generatrices are helices with the turn around shift <math>k\pi\;, </math> which lie on the cylinder ...

...conformations. The largest ASA values are consistently observed in alpha helices, with backbone angles around <math>\phi=-50^\circ</math> and <math>\psi=-45 ...

* '''Helices''' ...can be predicted by experimental data on the secondary structure elements, helices, loops, and bulges. DotKnot-PW method is used for comparative pseudoknots p ...

...ope of the windlass is depicted as spirals for clarity, but is more likely helices with axes perpendicular to the image.]] ...

...d redox-active [[Cysteine]] residues are located within the loops of these helices. Cysteine-55, 74, 76, and 85 are coordinated to the iron atoms of the [[cub ...

...sin is a globular soluble protein and thus not rigid. The insertion of its helices into the membrane force the neighboring lipids of the leaflet that has been ...

..., for instance, by Vladimír Petrův (1964),<ref name=petruv /> as "timelike helices" by [[John Lighton Synge]] (1967)<ref name=synge /> or as "stationary world ==Proper reference frames for timelike helices== ...

...superfamily. CNPase's catalytic core consists of three [[alpha helix|alpha-helices]] and nine [[beta sheet|beta-strands]]. The proposed mechanism of CNPases [ ...

...cuboctahedron transformations. In particular, the vertices always move in helices toward the center as the cuboctahedron transforms into the octahedron,{{Sfn ...