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J. Moll. Stud. (1989), 55, 441-444
© The Malacological Society of London 1989

research-article

A TYROSINASE-LIKE ENZYME IN CEPAEA NEMORALIS AND ITS POSSIBLE RELATION WITH SHELL BANDING POLYMORPHISM

A. VICARIO, L. I. MAZON, A. AGUIRRE, A. ESTOMBA and C. LOSTAO

Laboratorio de Genética. Departamento de Biologla Animal y Genética. Facultad de Ciendas Universidad del Pais Vasco. Apdo. 644. 48080 Bilbao, Spain

Shell banding polymorphism in Cepaea nemoralis may be related to tyrosinase activity in this gastropod, as the hyalozonate phenotype shows bands with no pigmentation. We aimed to establish if there is tyrosinase activity in Cepaea, and this activity was analyzed for different organs on electrophoresis gel slabs and oxygen electrode. We have found two isocnzymatic forms, one of them polymorphic, with high activity in the foot and mantle, organs both involved with the pigmentation of body and shell.

We propose that several isoenzymatic forms are functional in the melanosome. These may be activated during the cell lysis, as hyalozonate samples display tyrosinase activity.

(Received 22 June 1988; accepted 5 September 1988)


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