Midgut section contents (V1, V2 + V3, and V4), isolated as described above, were dispersed in 5 ml of the dissecting saline and added to 5 ml of a 5-fold dilution of a universal pH indicator
Midgut section contents (V1, V2 + V3, and V4), isolated asdescribed above, were dispersed in 5 ml of the dissecting saline andadded to 5 ml of a 5-fold dilution of a universal pH indicator