The repressor produced by this element's I gene is inhibited by the allo- form of the sugar that beta-galactosidase, one of its gene products, breaks down.
This structure's activity can be measured by the breakdown of ONPG and formation of the yellow orthonitrophenol. One mutation in it is tested for using phenyl-Gal. Two of its structural elements produce a detoxifying transacetylase and a permease. CAP forms a complex with cAMP to allow (*) RNA polymerase to bind to its weak promoter; this allows glucose to downregulate its activity. The repressor produced by this element's I gene is inhibited by the allo- form of the sugar that beta-galactosidase, one of its gene products, breaks down. For 10 points, name this operon that regulates the catabolism of a sugar found in milk.
This structure's activity can be measured by the breakdown of ONPG and formation of the yellow orthonitrophenol.
{lac} operon