Question: The RNA polymerase from bacteriophage T7 differs structurally from prokaryotic and eukaryotic RNAPs and is extremely specific for its own promoter. Why do these properties

The RNA polymerase from bacteriophage T7 differs structurally from prokaryotic and eukaryotic RNAPs and is extremely specific for its own promoter. Why do these properties make T7 RNAP useful in experiments with recombinant DNA?

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