Helices


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Helices

Figures like the tendrils of a vine.
References in periodicals archive ?
(16,20,21) The partially folded apoMb intermediate, in equilibrium, was characterized at the atomic level as being composed of helices A, G and H using NMR and hydrogen deuterium (HD) exchange.
According to the results of several studies [7, 8], the number of amino acid residues in 3/10 helices is about 10 times lower than the number of residues in alpha helices.
We emphasize the importance of the double stranded configuration of the particle, however, if the narrow directivity of the scattering is not necessary, an additional pairs of helices can be added into the particle design for more omnidirectional scattering.
Hacisalihoglu: On helices of a Lorentzian manifold, Commun.
Since the helices can form as either clockwise or counterclockwise spirals, they might prove useful in detecting or making mirror-image varieties of so-called chiral molecules, says Stupp.
A conventional volute antenna consists of two to four helices of short element length (a multiple of a quarter-wavelength).
Artificial single and double helices have been proposed for broadband circular polarizers [7-9] and have improved the signal to noise ratio [10].
Helices sometimes participate in more complex structures.
These plugs serve two purposes: to complete the electrical continuity of the ground plane at the base of the helices via capacitive coupling and to impedance match the helix inputs.
What's more, the helices that fill space most efficiently in the team's computer simulations closely resemble those that form naturally in proteins, report Amos Maritan of the International School for Advanced Studies (SISSA) in Trieste, Italy, and his colleagues.
[S.sub.11] and [S.sub.12] measurements were made on 2 helices spaced S inches apart.
To test the hypothesis, Hecht and his coworkers engineered 48 genes specially designed to make proteins that would fold into a bundle of four helices. The proteins that these genes encoded all had one thing in common: the same pattern of water-loving and water-repelling units in the same key spots.