Cubic liquid crystalline phase with phosphatidyl‐ethanolamine from Bacillus megaterium containing branched acyl chains
- 1 November 1982
- journal article
- Published by Wiley in FEBS Letters
- Vol. 149 (2) , 293-298
- https://doi.org/10.1016/0014-5793(82)81120-4
Abstract
Phosphatidylethanolamine (PE) was isolated from membranes of Bacillus megaterium. The organism was grown at 20°C and 55°C. The phase equilibria in PE/water systems were studied by 2H and 31P nuclear magnetic resonance, and by polarized light microscopy. PE isolated from B. megaterium grown at 20°C forms a lamellar liquid crystalline phase at the growth temperature, and at low water contents a cubic liquid crystalline phase at 58°C. The ratio iso/ante‐iso acyl chains was 0.3 in this lipid. PE isolated from this organism grown at 55°C forms only a lamellar liquid crystalline phase up to at least 65°C. In this lipid the ratio iso/ante‐iso acyl chains was 3.2.Keywords
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