Sterols,aliphatic hydrocarbons,and fatty acids of a nonphotosynthetic diatom,Nitzschia alba |
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| Authors: | T G Tornabene M Kates B E Volcani |
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| Affiliation: | (1) Department of Microbiology, Colorado State University, 80521 Ft. Collins, Colorado;(2) Department of Biochemistry, University of Ottawa, Ottawa, KIN 6N5, Canada;(3) Scripps Institution of Oceanography, University of California, 92037, California, La Jolla |
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| Abstract: | The unsaponifiable lipids and total fatty acids of a nonphotosynthetic diatom,Nitzschia alba, have been examined. The major fatty acids were found to be 14∶0, 16∶0, 18∶1, and 20∶5; small amounts of 15∶0, 16∶1, 18∶0,
18∶2, 18∶3, and 20∶4 acids also were present. The unsaponifiable lipids consisted mostly of sterols, with only traces (<0.1%)
of hydrocarbons (chiefly C16, C18, and C28 normal olefins). The sterols contained brassicasterol (major) and clionasterol (minor), as well as traces of an unidentified
sterol; clionasterol was present only in glycosidically bound form. |
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