And so eventually we form intermediate state B, in which all these bonds between these beta sheets and these beta sheets eventually break, and the bonds between the beta sheets and these alpha helixes break as well. And so intermediate state B describes only the secondary structures involved. So we have these four beta pleated sheets and these three alpha helices. Now eventually, as we continue to increase our temperature, the hydrogen bonds that hold all these secondary structures will also break. And so these different secondary structures will eventually break down denature until we form a single long polypeptide in its linear state. So now we only have the primary structure.