Production of docosahexaenoic acid by marine bacteria isolated from deep sea fish |
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Authors: | Yutaka Yano Akihiko Nakayama Hiroaki Saito Kenji Ishihara |
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Affiliation: | (1) National Research Institute of Fisheries Science, 2-12-4, Fukuura, Kanazawaku, 236 Yokohama, Kanagawa, Japan |
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Abstract: | Five bacterial strains isolated from the intestine of deep sea fish were shown to produce docosahexaenoic acid (22∶6n−3; DHA)
at a level of 6.4 to 11.6% of total fatty acids when incubated in DHA-free medium. In all of the strains examined, other polyunsaturated
fatty acids were barely detectable, except for eicosapentaenoic acid (20∶5n−3). A typical strain, such as T3615, produced
DHA at a concentration of about 0.8 mg/L within six days of aerobic incubation at 5°C and under atmospheric pressure. The
T3615 strain, belonging to the genusVibrio, is rod-shaped, Gram-negative, motile and facultatively anaerobic. |
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