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. Author manuscript; available in PMC: 2010 Nov 17.
Published in final edited form as: Structure. 2005 Aug;13(8):1203–1211. doi: 10.1016/j.str.2005.06.005

Figure 3. Cross-Sections through the Membrane-Spanning Region Parallel to the Membrane Plane.

Figure 3

(A) Side view of the membrane-spanning region displayed at the threshold level corresponding to a molecular mass of 2.2 MDa. The levels of sections are indicated with red dashed lines and are numbered beginning from the luminal side.

(B) Sections of density map normal to the 4-fold channel axis at the levels indicated in (A). The threshold for continuous contour lines and color coding has been chosen to highlight the density peaks composing the membrane-spanning region. The positions of the five rod-like densities in the four selected sections in the membrane-spanning region are indicated with corresponding numbers. The bar denotes 50 Å scale.