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Figure 1
Model β-sheet density and interpretation. (a) β-Sheet (from PDB entry 1gba ; Mace & Agard, 1995BB38; with side chains truncated at Cβ atoms) with model electron density calculated at a resolution of 2.5 Å. (b) Electron density with the locations of points along ridgelines of high density marked by green spheres and with red spheres marking the axis of two adjacent curved tubes of density. (c) View of model β-sheet showing a β-­strand with carbonyl O atoms pointing up and down towards adjacent strands. (d) β-Sheet built using the methods presented here, after the assembly step combining strands obtained by analysis of the map at resolutions of 2.5, 3 and 4 Å. These figures were produced using PyMOL (DeLano, 2002BB17).

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
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