Fig. 1

Time-course of the proteolytic activities exhibited by the midgut of An. aquasalis female. Proteolytic activities were detected after incubating the gels at 37 °C in 0.1 M Tris–HCl buffer (pH 7.5) for 30 min, 2, 4 and 6 h. The numbers on the left indicate the apparent molecular masses of the active bands expressed in kDa