Fig. 2. Behaviorally related differences in Amfor brain expression. Bars represent relative mRNA differences, normalized to nurses (N). Error bars represent the standard errors of the Ct converted to the same arbitrary scale as the means (see Materials and methods). P values on graphs refer to ANOVA; different letters denote statistically significant differences (P<0.05; pair-wise LSD post hoc analysis). N=8–10 brains per group (see numbers on bars), each brain was analyzed individually. FH, food handlers; U, undertakers; F, foragers.