SarA plays a predominant role in controlling the production of extracellular proteases in the diverse clinical isolates of <i>Staphylococcus aureus</i> LAC and UAMS-1.

With the exception of the spl::gfp reporter (see below), this difference was apparent with every truncated construct generated with every reporter until the promoter region was reduced to a region containing 100 bp upstream of the translational start site of each protease-associated gene and/or operon ( Figure 13 ).

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