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Biotechnol Lett. 2006 Feb;28(3):197-202.

Isolation and characterization of a novel thraustochytrid-like microorganism that efficiently produces docosahexaenoic acid.

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Laboratory of Environmental Molecular Biology, Graduate School of Environmental Earth Science, Hokkaido University, Sapporo, Kita-ku, 060-0810, Japan.


A thraustochytrid-like microorganism (strain 12B) was isolated from the mangrove area of Okinawa, Japan. On the basis of its ectoplasmic net structure and biflagellate zoospores we determined strain 12B to be a novel member of the phylum Labyrinthulomycota in the kingdom Protoctista. When grown on glucose/seawater at 28 degrees C, it had a lipid content of 58% with docosahexaenoic acid (DHA; 22:6 n-3) at 43% of the total fatty acids. It had a growth rate of 0.38 h(-1). The DHA production rate of 2.8 +/- 0.7 g l(-1) day(-1) is the highest value reported for any microorganism.

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