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Methyl sterol and cyclopropane fatty acid composition of Methylococcus capsulatus grown at low oxygen tensionsThe sterol and fatty acid concentrations for M. capsulatus grown in fed-batch cultures over a wide range of oxygen tensions (0.1-10.6 percent) and at a constant methane level are evaluated. The analyses reveal that the biomass decreases as oxygen levels are lowered; the sterol concentration increases when the oxygen range is between 0.5-1.1 percent and decreases when the oxygen range is below 0.5 percent; and the amount of monounsaturated C16 decreases and the concentration of cyclopropane fatty acids increases after oxygen is reduced. It is noted that growth and membrane synthesis occur at low oxygen concentrations and that the synthesis of membrane lipids responds to growth conditions.
Document ID
19870026773
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jahnke, L. L.
(NASA Ames Research Center Moffett Field, CA, United States)
Nichols, P. D.
(Florida State University Tallahassee, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1986
Publication Information
Publication: Journal of Bacteriology
Volume: 167
ISSN: 0021-9193
Subject Category
Life Sciences (General)
Accession Number
87A14047
Funding Number(s)
CONTRACT_GRANT: N00014-83-K-0056
CONTRACT_GRANT: N00014-82-C-0404
Distribution Limits
Public
Copyright
Other

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