| 摘要 |
<p>Genes have been isolated from Pantoea stewartii encoding geranylgeranyl pyrophosphate (GGPP) synthase (crtE), phytoene synthase (crtB), phytoene desaturase (crtl), lycopene cyclase (crtY), β-carotene hydroxylase(crtZ), and zeaxanthin glucosyl transferase(crtX) activity. The genes and their products are useful for the conversion of phytoene to the carotenoids. Vectors containing those DNA segments, host cells containing the vectors and methods for producing those enzymes and β-carotene by recombinant DNA technology in transformed host organisms are disclosed.</p> |
