A helix (/ˈhiːlɪks/; pl. helices) is a shape like a cylindrical coil spring or the thread of a machine screw. It is a type of smooth space curve with...

developments in the modeling of the modern α-helix were: the correct bond geometry, thanks to the crystal structure determinations of amino acids and peptides...

side chains. The two most common secondary structural elements are alpha helices and beta sheets, though beta turns and omega loops occur as well. Secondary...

Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule. It includes the general shape of the molecule as well...

facilitate the advance of sequence-reading enzymes such as DNA polymerase. The geometry of a base, or base pair step can be characterized by 6 coordinates: shift...

In the fields of geometry and biochemistry, a triple helix (pl.: triple helices) is a set of three congruent geometrical helices with the same axis, differing...

In differential geometry a translation surface is a surface that is generated by translations: For two space curves c 1 , c 2 {\displaystyle c_{1},c_{2}}...

analysis, combinatorics, algebraic, differential, discrete and Euclidean geometries, graph theory, group theory, model theory, number theory, set theory,...

articles about curves used in different fields: mathematics (including geometry, statistics, and applied mathematics), physics, engineering, economics...

In differential geometry, the Frenet–Serret formulas describe the kinematic properties of a particle moving along a differentiable curve in three-dimensional...

Non-B DB is a database integrating annotations and analysis of non-B DNA-forming sequence motifs. The database provides alternative DNA structure predictions...

biological membranes possess shapes that are analogous to these common geometry staples. For instance, prokaryotic cells such as cocci, rods, and spirochette...

In geometry, the 120-cell is the convex regular 4-polytope (four-dimensional analogue of a Platonic solid) with Schläfli symbol {5,3,3}. It is also called...

helix". New Geometries for New Materials. Cambridge University Press. p. 64. ISBN 978-0-521-86104-5. Banchoff, Thomas F. (1988). "Geometry of the Hopf...

A hemihelix is a curved geometric shape consisting of a series of helices with alternating chirality, connected by a perversion at the reversals. The...

well known that the writhing number is a standard measure of the global geometry of a closed space curve. Contrary to intuition, a topological property...

rigid bodies. Screw theory provides a mathematical formulation for the geometry of lines which is central to rigid body dynamics, where lines form the...

β-strands. However, Astbury did not have the necessary data on the bond geometry of the amino acids in order to build accurate models, especially since...

assigned a right or left handedness, according to the right-hand rule. In geometry, a figure is achiral if and only if its symmetry group contains at least...

In geometry, the 16-cell is the regular convex 4-polytope (four-dimensional analogue of a Platonic solid) with Schläfli symbol {3,3,4}. It is one of the...

that develops downstream). This is present in curved surfaces and general geometry changes like a convex surface. A unique example of severe geometric changes...

available, but might require multiple attachment by C1q with critical geometry in order to achieve the necessary avidity. "Entrez Gene: C1QA complement...

system and an alkali metal or nitrogenous cation. The optimal interaction geometry places the cation in van der Waals contact with the aromatic ring, centered...

proper geometry and proper alignment of the base pair, formed between bound dNTP and a matching base on the template strand. The correct geometry of A=T...

pair that had a different geometry from that described by Watson and Crick. Similarly, an alternative base-pairing geometry can occur for G•C pairs. Hoogsteen...

In geometry, a generalized helicoid is a surface in Euclidean space generated by rotating and simultaneously displacing a curve, the profile curve, along...

conformation occurs in double-stranded RNAs, and in DNA-RNA hybrid double helices. Like the more common B-DNA, A-DNA is a right-handed double helix with...

may refer to: Double helix, the structure of DNA Double helix (geometry), two helices with the same axis differing by a translation along the axis Double...

single crystal X-ray crystallography in 1959 revealed a structure whose geometry was very different from what was proposed by Watson and Crick. It had two...

layout and rendering of secondary structures with or without ideal helical geometry. In either case, the structure layout can be edited dynamically within...