Karotenhydroksylase og fremgangsmåter for fremstilling av xantophyll derivater

摘要

The present invention relates to proteins which have an enzymatic activity for converting beta-carotene into zeaxanthin or canthaxanthin into astaxanthin, to nucleic acids which encode these proteins, to nucleic acid constructs comprising these nucleic acids, to genetically manipulated organisms where the genetic manipulation causes or increases the gene expression of this nucleic acid by comparison with a wild-type, and to processes for preparing xanthophyll derivatives.