| 摘要 |
A cis-acting nucleotide sequence which is capable of rendering the removal of introit/s from a precursor transcript encoded by a gene, which gene harbors at least one such cis-acting nucleotide sequence, occurring during the production of mRNA of said gene, dependent upon activation of a trans-acting factor. The trans-acting factor is an RNA-activated protein kinase which is capable of phosphorylated the alpha-subunit of eucaryotic initiation factor 2, or the RNA-activated protein kinase (PAR). The cis-acting nucleotide sequence can be derived from the 3' untranslated region of the human tumor necrosis factor alpha gene (TNF-alpha 3'-UTR). The cis-acting nucleotide sequence may comprise the nucleotide sequence as denoted by SEQ ID NO: 1; or biologically functional fragments, derivatives, mutants and homologues of the nucleotide sequence as denoted by SEQ ID NO: 1; or a nucleotide sequence whose complementary nucleotide sequence hybridizes, under conditions which allow for such hybridization to occur, with the nucleotide sequences as denoted by SEQ ID NO: 1 or biologically functional fragments, derivatives, mutants and homologues of the nucleotide sequence as denoted by SEQ ID NO: 1.
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