Abstract

1. 1. Acetate- 14C incorporation by the homogenates of the eggs, larvae, pupae and adults of Ceratitis capitata shows clear differences. The pupal and larvae stages of development exhibit the most effective incorporation. 2. 2. NADPH influences the acetate incorporation in a different way. It enhances the incorporation by larval homogenate whereas it produces a net decrease of the incorporation by pupa homogenate. 3. 3. Citrate decreases the acetate incorporation by all homogenates. This effect is higher in the pupal homogenate. As for the influence of citrate on the activatory effect of the mixture ATP-Mg 2+ in larval and pupal homogenates, incorporation by larval and pupal homogenates is enhanced and decreased respectively. 4. 4. Differences in the regulation of fatty acid synthesis during larval and pupal stages of development are clearly shown.

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