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Simple, efficient in vitro synthesis of capped RNA useful for direct expression of cloned eukaryotic genes.

A simple and efficient method for direct in vitro synthesis of capped transcripts of cloned eukaryotic genes is described. As an example capped transcripts were made from a plasmid containing the human fibroblast interferon gene cloned under the control of a prokaryotic promoter. These transcripts were translated in vivo in Xenopus laevis oocytes and in vitro in reticulocyte and in wheat germ cell-free protein synthesizing systems.