| 摘要 |
<p>The invention relates to vectors produced in a donor host cell, which upon transfer into a receiver host cell maintain the desired expression of the nucleotide sequences which are located within the vector. The maintenance of the desired expression is achieved due to that the vector at least partly remains unmethylated within the receiver host cell. The donor host cell being different as compared to the receiver host cell and the receiver host cell being capable of methylating DNA. To prevent methylation, cytosines in a CpG motif in the nucleotide sequence to be transferred are replaced with cytosine analogues resistant to methylation. The invention also relates to methods for the production of such vectors and the use of the vectors in industry as well as in medicine.</p> |
