And so what that means is the error going this way will be much longer than the error going this way. And what that means is, in this particular situation, when we have deoxy hemoglobin, when none of the heme groups contain an oxygen, the structure will be predominantly and almost exclusively in the t state. Now, what happens when we bind a single oxygen onto that hen group? So, for example, when we fill this oxygen, what happens is the error going this way becomes ever so slightly longer. And what that means is the equilibrium shifts slightly towards this side, towards the r state. But in this particular case, our structure will still be predominantly in the t state.