The proteins RhaA and RhaB are produced by the Rha Operon. You discover that there is a regulator protein Rha O that binds to the Rha operator sequence and activates transcription of the Rha operon. Rha O is encoded by a separate gene.
You find a mutant bacteria cell that is able to express a normal RhaA protein but no RhaB protein. You isolate mRNA from the bacteria and find that there are normal levels of both RhaA and ThaB mRNA. List 2 possible mutations that could cause this phenotype. Be as specific as possible about the location of mutation.