| 摘要 |
The invention relates to novel expression cassettes and expression vectors, having three nucleic acid sequences for araA, araB and araD, each coding for a polypeptide of an L-arabinose metabolic pathway, in particular, a bacterial L-arabinose metabolic pathway. The invention particularly relates to expression cassettes and expression vectors, having codon-optimised nucleic acid sequences for araA, araB and araD. The invention further relates to host cells, in particular, modified yeast stem cells containing the expression cassettes or expression vectors and expressing the polypeptides for the L-arabinose metabolic pathway, in particular, for the bacterial L-arabinose metabolic pathway. Arabinose is more effectively fermented by these cells,in particular to give ethanol, by means of said modified host cells. The invention is amongst other things important in the production of biochemicals from biomasses such as, for example, bioethanol. |
