A new labyrinthulid isolate, which solely produces n-6 docosapentaenoic acid
2003
Kumon, Y. | Yokoyama, R. | Yokochi, T. | Honda, D. | Nakahara, T.
A labyrinthulid strain, L59, was isolated from a leaf floating on seawater collected at the coastal area of Hokkaido Prefecture, Japan. Strain L59 contained only n-6 docosapentaenoic acid (n-6 DPA) among all the long-chain polyunsaturated fatty acids. The proportion of n-6 DPA in the total fatty acids was 48.1% and the total fatty acids content in the cell dry weight was 26.6%. Many oil bodies were observed in the cell, mostly in the vicinity of cell membranes. The strain had spindle-shaped cell bodies and all cells were surrounded by ectoplasmic net elements. It was also clearly classified in the labyrinthulid group by phylogenetic analysis. In the optimum culture condition, using soybean oil and peptone as carbon and nitrogen sources, 0.53 g of n-6 DPA/l was produced at 20°C in 7 days.
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