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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: Eur Biophys J. 2013 Sep 1;42(10):10.1007/s00249-013-0925-x. doi: 10.1007/s00249-013-0925-x

Fig. 14.

Fig. 14

Potential Effects of the Lateral Pressure Profile. The atoms of the charged residues are displayed as spheres. a&b) The Zinc transporter, YiiP (2QFI) has two 6 helix bundles splayed when viewed orthogonal to the plane containing the bundles (a) such that lipids could diffuse into the structure. b) When viewed at an oblique angle the cavities within the bundles are substantial, especially in comparison to (c) the well packed helices of the pyrophosphatase (4A01) where again the cavities in the structure are displayed, but are much smaller.