Abstract
Control of specific protein synthesis by juvenile hormone during sexual maturation and reproduction is being studied in the left colleterial gland of the cockroach Periplaneta americana. Rates of specific oothecin synthesis and oothecin mRNA concentrations have been measured during sexual maturation and the effects of allatectomy and administration of juvenile hormone determined. The heterogeneity of the oothecins has been characterized and found to be due probably to a multiplicity of structural genes. The complete primary structure of the major oothecin has been deduced from the sequences of cloned cDNAS. It can be divided into a central region and two flanking arms that share sequence features. The structures of the oothecins show strong homologies with the silkmoth chorion proteins.
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