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. Author manuscript; available in PMC: 2011 May 12.
Published in final edited form as: J Am Chem Soc. 2010 May 12;132(18):6498–6506. doi: 10.1021/ja100936w

Figure 4.

Figure 4

Gradient isosurfaces (spro = 0.35) for cuboid sections of the (a) β-sheet and (b) α-helix polypeptides. Gradient isosurfaces (spro = 0.25) are also shown for the (c) B-form of DNA, and the (d) A-T and (e) C-G base pairs. The surfaces are colored on a blue-green-red scale according to values of sign(λ2) ρ, ranging from −0.06 to 0.05 au. Blue indicates strong attractive interactions and red indicates strong non-bonded overlap.