Skip to main content
. Author manuscript; available in PMC: 2017 Jul 1.
Published in final edited form as: Biochim Biophys Acta. 2016 Feb 4;1858(7 Pt B):1619–1634. doi: 10.1016/j.bbamem.2016.02.003

Figure 2.

Figure 2

Mathematical representation of the membrane. A. A cartoon model representing the upper and lower leaflets and the corresponding lipid molecules. N⃗ is the normal vector of the bilayer midplane (dashed line), n⃗ is the head-to-tail vector of the lipids, and t⃗ is the difference of these two vectors. B. The upper and lower surfaces representing the head-group interfaces with the water from panel A (solid lines) and the bilayer midplane (dashed line). The lipids have been removed in this purely mathematical representation, but the vectorial descriptions N⃗± and n⃗± remain.