So what that means is at equilibrium we're going to have much more of the R state than the T state. On the other hand, for this particular case at equilibrium we're going to have much more of the inactive T state than the active R state. Now, how do we go from phosphorase B to phosphorlase A? Well, we have an enzyme known as phosphorase kinase, which we'll discuss in just a moment. And what it does is it basically phosphorylates specific serine amino acids on this glycogen phosphorylase. So remember this is a dimer, we have two polypeptide chains, so one polypeptide chain and a second polypeptide chain.