highly significantp <0.001
The significance of G H was due to the fact that the first experiment was not significant (the upper bar of figure 2 a : G =1.95, p =0.16), whereas other two experiments were highly significant (the middle bar of figure 2 a : G =23.76, p <0.001, the lower bar of figure 2 a , G =26.0, p <0.001).