Improved fermentative carotenoid production

摘要

The present invention is directed to processes for the preparation of canthaxanthin, adonixanthin, astaxanthin, a mixture of adonixanthin and astaxanthin and zeaxanthin by a cell which has been transformed by DNA sequences encoding the respective biosynthetic enzymes of Flavobacterium and the gram negative bacterium E-396. Furthermore the present invention is directed to a food or feed composition comprising one or more of the aforementioned carotenoids.