The structure shown here corresponds to the most ordered arrangement of the phospholipids, the so-called "crystal" phase. Similar displays of the gel and fluid phases show more disorder in the fatty acid tails of the phospholipid.A Piece of Membrane for Modern/Cell Biology
The yellow box enclosing this piece is about 80Å on each side. Each phospholipid has a polar phosphatidyl choline headgroup and hydrophobic tails of oleic and palmitic fatty acids. H2O molecules cover the bottom surface and about half of the top surface.
"Dissect" the structure as follows to see specific portions of the bilayer:
A Chime Viewer's Guide and the download site for this plug-in are linked under Viewing Tips on the Molecules for Modern/Cell Biology at CMU page.
Those coordinates were modified slightly by Dr. Eric Martz for his RasMol "animation" of the Lipid Bilayer; this page uses his file, "cutc2.pdb".
See also Dr. Eric Martz' treatment of Lipid Bilayer Membranes to view GIFs of the crystal, gel and fluid models and for downloading the coordinates of each.