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Construction of a series of plasmids containing sequential deletions of the STA2 and MUC1 UAS1 area, upstream of the lacZ reporter gene in plasmid pHP41. The positions of UAS1 and UAS2 relative to the translation initiation codon (ATG) of the STA2 and MUC1 ORFs are indicated, and the positions of the fragments in the respective promoters are given. The position of the 20-bp insert of the MUC1 promoter is indicated by the black bars.
