Cyclic nucleotide cyclase variation during development of the insect Ceratitis capitata.

Guanylate and adenylate cyclase activities were estimated in homogenates of the insect Ceratitis capitata at various stages of development. Guanylate cyclase activity was notably higher than adenylate cyclase activity in agreement with both cyclic nucleotide ratio and cyclic nucleotide-dependent protein kinase ratio reported in arthropod tissues. Variations in both enzyme activities during development were coincident in the adult development, while in other biological stages, as the larval development and puparium formation, the most significant changes affected to the activity of guanylate cyclase.