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. 1970 Apr;102(1):24–29. doi: 10.1128/jb.102.1.24-29.1970

Effect of Biotin on Fatty Acids and Phospholipids of Biotin-Sensitive Strains of Rhizobium japonicum1

C R Bunn a, J J McNeill a, G H Elkan a
PMCID: PMC284965  PMID: 5437727

Abstract

The effect of biotin on fatty acids and intact lipids was studied by comparing a biotin-requiring, a biotin-inhibited, and a biotin-indifferent strain of Rhizobium japonicum. These organisms were grown in a defined medium with added levels of 0, 0.3, and 0.5 μg of biotin per liter, and were analyzed for fatty acids and lipid components. Myristic, palmitic, and octadecenoic acids were found to be the major fatty acids in these strains. The indifferent strain also contained large amounts of C19 cyclopropane acid and small amounts of a C17 cyclopropane acid. Several unidentified acids were present in the other two strains. The percentages of fatty acids showed statistically significant changes corresponding with changes in level of biotin in the medium. When biotin concentration was increased in the medium, the C18 monoenoic acids of the biotin-requiring strain increased significantly, and those of the biotin-inhibited and biotin-indifferent strains decreased significantly. Palmitic acid showed a statistically significant increase in the indifferent strain with increasing biotin concentration. The principal intact lipid components in these strains are phospholipids. The major phospholipids are phosphatidylserine, phosphatidylcholine, phosphatitidylethanolamine, and cardiolipin. These phospholipids were not affected by biotin level and were independent of medium composition.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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