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Lipids of the marine bacterium Flexibacter polymorphus

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Abstract

This paper reports on the total fatty acid composition of a marine bacterium representative of the genus Flexibacter. Flexibacter polymorphus is unusual in containing a high proportion of the polunsaturated acid C20:5ω3 whilst the level of branched fatty acids is low. These facts suggest that the membrane flexibility necessary for its gliding motility is a function of the polyunsaturated fatty acid composition. Biosynthetic precursors to the C20:5 acid are present which are characteristic of an oxygen-dependent pathway. The fatty acid composition of the structural lipids is influenced by changes in the culture medium. Na2S inhibits production of the C20:5 acid at levels much lower than that at which it is known to inhibit growth. The intracellular granules observable in F. polymorphus do not contain elemental sulphur, in contrast to Beggiatoa sps., but instead probably contain lipids.

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  1. Department of Organic Chemistry, University of Melbourne, 3052, Parkville, Victoria, Australia

    R. B. Johns & G. J. Perry

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  1. R. B. Johns
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  2. G. J. Perry
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Johns, R.B., Perry, G.J. Lipids of the marine bacterium Flexibacter polymorphus . Arch. Microbiol. 114, 267–271 (1977). https://doi.org/10.1007/BF00446872

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  • DOI: https://doi.org/10.1007/BF00446872

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