Three-dimensional model of purple membrane obtained by electron microscopy.
A 7-A resolution map of the purple membrane has been obtained by electron microscopy of tilted, unstained specimens. The protein in the membrane contains seven, closely packed, alpha-helical segments which extend roughly perpendicular to the plane of the membrane for most of its width. Lipid bilayer regions fill the spaces between the protein molecules.
D001426:Bacterial Proteins; D001436:Bacteriorhodopsins; D002338:Carotenoids; D006217:Halobacterium / Q000648:ultrastructure*; D008055:Lipids; D008854:Microscopy, Electron / Q000379:methods; D008961:Models, Structural; D011487:Protein Conformation
D001426:Bacterial Proteins; D008055:Lipids; D002338:Carotenoids; D001436:Bacteriorhodopsins