The tac promoter, an artificial promoter made from portions of the trp and lacUV5 promoters, has been introduced into a plasmid. It is a hybrid of the lac and trp (tryptophan) promoters, containing the β35 region of one and the β10 region of the other. This promoter directs transcription initiation more efficiently than either the trp or lac promoters. Why? Match the words in the left column to the appropriate blanks in the sentences on the right.
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The tac promoter, an artificial promoter made from portions of the trp and lacUV5 promoters, has bee...
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