The pitch of a typical 3.6-helix (an alpha helix with 3.6 residues per "turn") is approximately 5.4 angstroms [2]. To give a sense of scale, the pitch of A-DNA (with approximately 11 base pairs per turn) is approximately 28.2 angstroms [3].
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A normal helix is a helix on the pitch cylinder, normal to the pitch helix. Pitch line [ edit ] The pitch line corresponds, in the cross section of a rack, to the pitch circle (operating) in the cross section of a gear.
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Directions for Use. Enter your data parameters into the fields on the left; Click the green arrow in the center of the calculator; Your answers will appear in the fields on the right
The pitch of the helix (vertical distance in one complete helical turn) is 5.4 Å; hence, the rise per residue along the helix axis is 1.5 Å. In an α-helix, the H-bonds are intrachain and parallel to the axis of the helix.
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Helix Calculator Radius = Height = Angle in Plan = Helix Data Cylinder Circumference = Helix Length = Unit Rise = Pitch Angle: Degrees = Handrail Radius = Data for Specified Section Fraction of Total = Length of Circle Arc = Helix Section Length = Baluster (Handrail) Radius Formula ...
The pitch of a helix is the height of one complete helix turn, measured parallel to the axis of the helix. A double helix consists of two (typically congruent) helices with the same axis, differing by a translation along the axis.
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