Suppose that two different missense mutations in the arabinose isomerase were found to complement one another. How could this be possible? Suppose that a point mutation in the araC gene could...

Suppose that two different missense mutations in the arabinose isomerase were found to complement one another. How could this be possible? Suppose that a point mutation in the araC gene could nonetheless yield Ara⁺
cells when a particular CRP mutation was introduced into the cell. What could you infer about the functioning of the system, and what could you conclude definitely?