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Conformational analysis of phosphatidylethanolamine in multilayers by infrared dichroism

✍ Scribed by Hideo Akutsu; Yoshimasa Kyogoku; Hiroo Nakahara; Kiyoshige Fukuda

Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
840 KB
Volume
15
Category
Article
ISSN
0009-3084

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✦ Synopsis

Built-up films of L-a-dipalmitoyl phosphatidylethanolamine were prepared. Infrared dichroism was measured for the sample and analysed by a new method. This method has been developed for the determination of the directions of transition moments in a film sample, in which there is an axis of symmetry of perpendicular to the film plane. The directions of transition moments were determined for the six vibrations assigned to the CH: antisymmetric stretching, CH2 symmetric stretching, CI! 2 scissoring, C=O stretching, POT antisymmetric stretching, and C-C-N antisymmetric stretching modes. The results indicate that hydrocarbon chains are inclined at about 75 degrees to the film plane and the polar groups orient parallel to the plane in the builtup film. A structural model of the phosphatidylethanolamine in the built-up film is proposed.

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