Compartimentage des activités enzymatiques dans le spermatozoïde de certains mollusques gastéropodes: I. localisation des déshydrogenases

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Abstract
By electron-microscope cytochemistry, succinate- and NADH2-tetrazolium reductase activities have been demonstrated in spermatozoa of the pulmonate gastropods, Testacella and Helix. Enzyme reaction product is restricted to the mitochondrial compartment named the secondary helix; this compartment is derived from the matrix of typical mitochondria. ‘Mitochondrial metamorphosis’ during spermiogenesis accomplishes the segregation of dehydrogenases to this matrical compartment.