And what that means is the activity of the enzyme when it's in the T state will be low. In contrast, in the r state, as a result of the loose confirmation of the dimer structure, the active sites are actually open. And what that means is the r state is the fully active form of this enzyme. In the r state the activity will be high, while in the T state the activity will be low. Now, what's the difference between phosphorase A and phosphorase B? Well, phosphorlase A, the equilibrium of phosphorase A exists predominantly on the r side, while the equilibrium for the phosphorase B molecule exists predominantly in the T state.