sentences:  hMSH6 combines with hMSH2 to form the active protein complex, hMutS alpha, also called hMSH2-hMSH6.Mismatch recognition by this complex is regulated by the ADP to ATP transformation, which provides evidence that hMutS alpha complex functions as a molecular switch.In normal DNA, adenine (A) bonds with thymine (T) and cytosine (C) bonds with guanine (G).