Abstract

AbstractThe bilayer structure of the phospholipid L‐α‐dimyristoylphosphatidylethanolamine (DMPE) was determined by X‐ray diffraction fiber methods. This study was carried out on oriented films at different degrees of hydration at room temperature (about 19°C). DMPE molecules pack very closely with their two hydrocarbon chains almost fully extended and coplanar with their polar group, which lies perpendicular to the chains. It was found that the unit cell dimensions of DMPE did not vary appreciably between 0 and 86% relative humidity nor did its longest axis with an excess of water. The methods and techniques used to prepare the specimens and to solve the structure are described.

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