That structure codes for beta-galactosidase and is the lac operon.
Some strains of these organisms are capable of synthesizing verotoxin, which resembles shiga toxin, and infection of humans by those strains often leads to hemolytic uremic syndrome. One structure found in these organisms is often upregulated by adding IPTG, and the activity of that structure in these organisms is indicated if X-gal turns blue in a commonly used assay. That structure codes for beta-galactosidase and is the lac operon. This organism was the subject of the Messelson-Stahl experiment, and the T4 bacteriophage infects these organisms. For 10 points, name this rod shaped gram negative bacterium, whose strains include the virulent O157:H7.
Some strains of these organisms are capable of synthesizing verotoxin, which resembles shiga toxin, and infection of humans by those strains often leads to hemolytic uremic syndrome.
Escherichia coli [or E. coli]