Abstract

Larvae of Aedes aegypti excreted chymotrypsin. Excretion of the enzyme was low during larval development but increased greatly at larval-pupal ecdysis; more than 90 per cent of the midgut chymotrypsin was found in the excreta. Strong trypsin and amylase activity was also detected in the excreta. The properties of excreted chymotrypsin and midgut chymotrypsin were identical. A method of obtaining large amounts of digestive enzymes from the excreta of mosquito larvae is outlined.

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