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| Content Provider | PubMed Central |
|---|---|
| Author | Ray, Paul H. White, David C. Brock, Thomas D. |
| Abstract | Thermus aquaticus contains four major fatty acids, iso-C15 (28%), iso-C16 (9%), normal-C16 (13%), and iso-C17 (48%), when grown at 70 C, as determined by gas chromatography and mass spectrometry. Small amounts of iso-C12, normal-C12:1, iso-C13, normal-C14, iso-C14, and normal-C15:1 were also detected. A change in growth temperature (50 to 75 C at 5-C intervals) affects a shift in the proportions of some of the fatty acids. The proportions of the monoenoic and branched-C17 fatty acids decreased and the proportions of the higher-melting iso-C16 and normal-C16 fatty acids increased. Cells grown at 75 C contained 70% more total fatty acids than cells grown at 50 C. The largest increases, in absolute amounts, were in the content of iso-C16 and normal-C16 fatty acids, with only a 1.6-fold increase in the major iso-C15 and iso-C17 fatty acids. There was a 2.5-fold decrease in normal-C15:1 and at least a 24-fold decrease in anteiso-C17, which is present at 50 and 55 C but not at higher temperatures. There was no difference in proportion or amount of fatty acids between exponential and stationary-phase cells grown at 70 C. When cells were grown on glutamate instead of yeast-extract and tryptone at 70 C, the total fatty acid content remained constant, but there was an increase in the proportions of iso-C16 and normal-C16 fatty acids concomitant with a decrease in the proportions of the iso-C15 and iso-C17 fatty acids. |
| Starting Page | 25 |
| File Format | |
| ISSN | 10985530 |
| e-ISSN | 10985530 |
| Journal | Journal of Bacteriology |
| Issue Number | 1 |
| Volume Number | 106 |
| Language | English |
| Publisher Date | 1971-04-01 |
| Access Restriction | Open |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Molecular Biology Microbiology |
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