In the inhibition experiments with Zn(II)-Aβ40, 9,10-AQ, HQ, Ali, Qui, and Pur upon As described in Figure , metal-free Aβ40 and metal-Aβ40 aggregates generated with and without the treatment of 9,10-AQ, Pur, or Alo were further examined by TEM. 9,10-AQ, Pur, and Alo were chosen as the representative molecules of Parent, Group A, and Group B, respectively.