CIS-ACTING REPRESSION SEQUENCES, CIS-ACTING ANTI-REPRESSION SEQUENCES VECTORS, METHODS OF PREPARATION AND USE

摘要

Cis-acting repression sequences which are able to provide a cis-acting inhibitory effect on the expression of a gene when placed downstream of the gene in its untranslated message are dislcosed. Cis-acting anti-repression sequences which can relieve the cis-acting repression in the presence of the art gene product are also disclosed. These sequences correspond to a sufficient number of nucleotides from the HIV-I, HIV-2, STLV-3 or HTLV-IV genomes to provide the repression or anti-repression effects. The use of the sequences in vectors and systems to control the expression of a desired gene product is also described. . . . .