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. 2014 Dec 19;9:32. doi: 10.1186/s13062-014-0032-7

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© Lombard; licensee BioMed Central. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Possible molecular arrangements of biological membranes redrawn from Danielli in 1936 [ 101 ] . A-E. Cross-section of hypothetical membranes with internal lipids and coating proteins. F. Cross-section of an hypothetical membrane made up of lipoprotein subunits. G-I. Surface of mosaic membranes.