FIGURE 12.

α-amylase activity in the different midgut regions. (A) α-amylase activity in midgut juice extracted from anterior, middle, and posterior midgut. The values are reported as mean ± SEM of at least 3 experiments. Different letters denote significant differences (ANOVA test followed by Tukey’s test. ANOVA p-value < 0.001, Tukey’s test p-values: Middle vs. Anterior p < 0.001, Posterior vs. Anterior p < 0.05, Posterior vs. Middle p < 0.05). (B) Dependence of α-amylase activity on pH in midgut juice from the anterior region of the midgut. Relative activity values (%) are reported as mean ± SEM of at least 3 experiments and are expressed as percentage of the highest activity over the pH range examined.