Figure 1

Distribution of α-amylase and protease activities in the whole body extract and faecal extract of A. siro (A.s.) and D. farinae (D.f.). The α-amylase activities were assayed at the respective pH optima with RBB-starch as a substrate. The protease activities were assayed with azocasein as a substrate; the contribution of cysteine proteases (dashed) was determined as the part of protease activity inhibited by E-64. The specific activities (units per mg protein) are normalized to the maximum value measured for α-amylases and proteases, respectively; mean values ± SE are given.