 | Acta Crystallographica Section D Acta Crystallographica Section D BIOLOGICAL CRYSTALLOGRAPHY |
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![[Figure 1]](dz5182fig1mag.jpg)
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Figure 1
Model α-helix density and interpretation. (a) Model α-helix at a resolution of 3 Å. (b) Model α-helix at a resolution of 7 Å. (c) Points along the axis of a tube of density at a resolution of 7 Å. (d) Positioning an α-helix in model density. The dark blue mesh is a contour of model electron density at a resolution of 3 Å. The gray helix is fitted to the main-chain atoms of the model α-helix and has a radius of 2 Å and a pitch of 5.4 Å. The red and yellow helices are offset by ±1 Å along the helix axis from the gray main-chain helix and have radii of 4 Å. (e) Model α-helix (in green), model density (in blue) and fitted α-helix (in red). This figure was created using PyMOL (DeLano, 2002  ). |
![[Figure 1]](dz5182fig1.jpg)
| BIOLOGICAL CRYSTALLOGRAPHY |
ISSN: 1399-0047
