Brian Feth

Brian Feth

San Francisco, California, United States
5K followers 500+ connections

About

I am a life sciences entrepreneur passionate about creating transformative change in…

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  • Xcell Biosciences Graphic

    Xcell Biosciences

    Mission Bay, San Francisco, CA

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    Basel Area, Switzerland

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    San Francisco, CA

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    Nairobi, Kenya; Accra, Ghana

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    Los Angeles, CA; San Francisco, CA

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    Palo Alto, CA

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    Hangzhou, Zhejiang, China

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    Berkeley, CA

Education

Publications

  • A mutant of the green alga Dunaliella salina constitutively accumulates zeaxanthin under all growth conditions

    Biotechnology and bioengineering

    A novel mutant (zea1) of the halotolerant unicellular green alga Dunaliella salina is impaired in the zeaxanthin epoxidation reaction, thereby lacking a number of the β-branch xanthophylls. HPLC analysis revealed that the zea1 mutant lacks neoxanthin (N), violaxanthin (V) and antheraxanthin (A) but constitutively accumulates zeaxanthin (Z). Under low-light physiological growth conditions, the zea1 (6 mg Z per g dry weight or 8 × 10−16 mol Z/cell) had a substantially higher Z content than the…

    A novel mutant (zea1) of the halotolerant unicellular green alga Dunaliella salina is impaired in the zeaxanthin epoxidation reaction, thereby lacking a number of the β-branch xanthophylls. HPLC analysis revealed that the zea1 mutant lacks neoxanthin (N), violaxanthin (V) and antheraxanthin (A) but constitutively accumulates zeaxanthin (Z). Under low-light physiological growth conditions, the zea1 (6 mg Z per g dry weight or 8 × 10−16 mol Z/cell) had a substantially higher Z content than the wild type (0.2 mg Z per g dry weight or 0.5 × 10−16 mol Z/cell). Lack of N, V, and A did not affect photosynthesis or growth of the zea1 strain. Biochemical analyses suggested that Z constitutively and quantitatively substitutes for N, V, and A in the zea1 strain. This mutant is discussed in terms of its commercial value and potential utilization by the algal biotechnology industry for the production of zeaxanthin, a high-value bioproduct.

    Other authors
    • EonSeon Jin
    • Anastasios Melis
    See publication

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