| 摘要 |
The present invention is concerned with the provision of means and methods for gene expression. Specifically, it relates to a polynucleotide comprising an expression control sequence which allows for bidirectional expression of two nucleic acid of interest being operation linked thereto in opposite orientations. Furthermore, vectors, host cells, non-human transgenic organisms and methods for expressing nucleic acids of interest are provided which are based on the said polynucleotide.
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