| abstract |
(57) [Summary]nThe present invention relates to the introduction of DNA or RNA sequences into mammalian cells to achieve regulated expression of a polypeptide. Thus, it is useful in gene therapy, prophylactic tumors, and any therapeutic context in which the polypeptide is to be administered to a host or cells of said host, and for production of the polypeptide by mammalian cells, for example, in culture or in transgenic animals. is there. |