Histochemical Observations of Alkaline Phosphatases in the Integument, Gastrolith Sac, Digestive Gland, and Nephridium of the Crayfish

Abstract
Dephosphorylating activities of alkaline phosphatases in the integument, gastrolith sac, digestive gland, and nephridium during stages of the molting cycle of the crayfish were studied histochemically. The organs studied, with the exception of the nephridium, displayed changes in phosphatase activity associated with the molting cycle. There was a marked intensity of alkaline phosphatase activity in the cortical tube of the crayfish nephridium.
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