초록

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Abstract ▼ AI-Helper

The yeast strain 504D, isolated from salted shrimp soup, showed the best proteolytic activity under alkaline condition. The yeast formed vegetative cells in almost optimal media for yeasts, but formed only pseudohyphae in the MM medium containing citric acid and true hyphae in the MM medium containi...

The yeast strain 504D, isolated from salted shrimp soup, showed the best proteolytic activity under alkaline condition. The yeast formed vegetative cells in almost optimal media for yeasts, but formed only pseudohyphae in the MM medium containing citric acid and true hyphae in the MM medium containing N-acetylglucosamin and ${\beta}$-D-glucose. The yeast was classified as hemiascomycetes to form ascospores by sexual reproduction, and formed blastospores and athrospores by asexual reproduction. The yeast strain did not assimilate almost of the carbon sources, nitrate and nitrite, but some organic acids and alcohols. The fatty acids of whole cells were composed of 53.67% unsaturated fatty acids and 14.58% saturated, and, especially, C17:1 was observed in this strain but not in two control yeasts. However, almost of all results were very similar to the morphological and physiological characteristics of Yarrowia lipolytica KCCM 12495 and KCCM 35426, except for a little differences which are the composition of fatty acids and the manner of mycellium formation. Therefore, the isolated yeast strain 504D is identified as a Yarrowia lipolytica.

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