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US 5,691,190 AGranted
Phaffia rhodozyma mutants, process for producing .beta.-carotene and use of .beta.-carotene rich biomass
AssigneePernod Ricard
InventorsPatrick Girard, Catherine Eliane Jeannie Javelot, Barbu Dinu Vladimir Vladescu
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Abstract
The subject of the present invention is Phaffia rhodozyma mutants blocked in the step of conversion of .beta.-carotene in the pathway of biosynthesis of astaxanthin. The present invention also relates to a process for producing .beta.-carotene using these mutants, for purposes of use in the preparation of foodstuffs or cosmetic or pharmaceutical products.
Claims8
Phaffia rhodozyma mutant blocked in the step of conversion of .beta.-carotene in the pathway of biosynthesis of astaxanthin characterized by being obtained by a process comprising the steps of:
- (1) treating with a physical or chemical mutagenic agent of a wild type Phaffia rhodozyma CBS 6938 strain in culture;
- and
- (2) selecting the yellow-colored clones obtained after step 1.
Dependencies are inferred from the claim text.