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Biochemical modification of the acetylcholinesterase (AChE) and non-specific esterases of a planarian species [Dugesia tigrina (Girard)] were studied as a function of regeneration. The enzymatic activities were measured in regenerating planarians at regular time intervals from the beginning of the regeneration process to the complete restoration of the animal. Both enzymatic activities were substantially altered during the regeneration process of caudal and cephalic segments. Polyacrylamide gel zymograms for soluble α-naphthyl acetate hydrolytic activity revealed four bands of activities. These activities were fractioned into two major on cation exchange high performance h between 6 and 7 and were inhibited by PMSF, TPCK, TLCK and n-ethyl maleimide.

Acetylcholinesterase and Non-Specific Esterase Activities during the Regeneration of Planaria Dugesia tigrina (Girard)