Abstract
β-Ionone, an end ring analog of β-carotene, inhibits astaxanthin production in the red yeast Phaffia rhodozyma. Astaxanthin-overproducing mutants of this yeast are easily spotted on β-ionone-containing yeast malt agar plates. β-Ionone appears to block astaxanthin synthesis at the β-carotene level.
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Selected References
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