In contrast , consistent with the hypothesis that zupT is constitutively expressed in E. coli , this putative consensus sequence was found to be absent in the E. coli zupT promoter .31 To test whether S. Typhimurium zupT is regulated by Zur , we electroporated plasmid pMCPzupT-lacZ in a strain lacking PP127 , obtaining pMCPzupT-lacZ zur .
In contrast , consistent with the hypothesis that zupT is constitutively expressed in E. coli , this putative consensus sequence was found to be absent in the E. coli zupT promoter .31 To test whether S. Typhimurium zupT is regulated by Zur , we electroporated plasmid pMCPzupT-lacZ in a strain lacking zur , obtaining pMCPzupT-lacZ zur .
In contrast , consistent with the hypothesis that zupT is constitutively expressed in E. coli , this putative consensus sequence was found to be absent in the E. coli zupT promoter .31 To test whether S. Typhimurium zupT is regulated by Zur , we electroporated plasmid pMCPzupT-lacZ in a strain lacking zur , obtaining the strain PP153 .