Specialized transduction can be carried out by _____. The protein of E. coli that is produced by a regulatory gene of the lac operon is _____. The lactose operon is likely to be transcribed when _____ and _____ are both at high concentrations in E. coli. In E. coli when lactose is present and glucose is absent the group translocation system activates _____ which causes the second messenger levels to increase in the cell and activate the lac operon. Bacteria protect their own DNA from restriction by adding _____ to adenines and cytosines. A genomic _____ is a set of cloned fragments that includes the entire genome of an organism.