Fig. 7.

Anxiety assay based on the number of glass marbles buried by the mice in a 30 min period. Mutant animals lacking brain AM (gray bars) are more anxious than their wild-type littermates (open bars). Bars represent the mean ± standard deviation of 10 mice. The whole experiment was repeated twice, and a representative example is presented here. *, P < 0.05; **, P < 0.01.