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DNA sequence of the CRS and Inr elements associated with the MIE and US3 promoters. The consensus sequences of the MIE CRS is CGN10CG; that of the US3 CRS is CGN11CG. Both IE promoters have an Inr element immediately downstream of the CRS and the transcription start site. The transcription start site is indicated by the arrow, and the base is in boldface. Mutation of the US3 CRS is indicated in lowercase.
