Abstract
The non-saponifiable neutral lipid composition of nineteen bacterial strains isolated from Antarctic sea ice were analysed. Nine of these strains produced a novel highly unsaturated straight chain hydrocarbon as the major non-saponifiable neutral lipid component. The compound was identified as hentriacontanonene (n-C31.9) by mass spectrometry and the formation of n-C31:0 following hydrogenation. The occurrence of n-C31:9 also correlated with the production of polyunsaturated fatty acids (PUFA) by the bacterial strains. n-C31:9 may therefore represent a novel biomarker for the location of PUFA-producing bacteria from environmental samples.
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