Comparison of structure-activity relations of corazonin using two different bioassay systems.

The structure-activity relations of [His(7)]-corazonin were studied using two different bioassay systems; i.e. inhibitory effect on spinning rate in the silkworm, Bombyx mori, and darkening response in albino nymphs of the migratory locust, Locusta migratoria.

Bombyx mori orphan receptor, BmHR78: cDNA cloning, testis abundant expression and putative dimerization partner for Bombyx ultraspiracle.

We have identified a novel member of the nuclear receptor superfamily from the silkworm Bombyx mori, and named it as BmHR78, the B. mori hormone receptor. The DNA binding domain of BmHR78 shows high similarities to those of Tenebrio molitor hormone receptor 78, Drosophila hormone receptor 78, and mammalian testicular receptor 2, whereas the ligand binding domain is not well conserved.

cDNA cloning and characterization of Bombyx mori juvenile hormone esterase: an inducible gene by the imidazole insect growth regulator KK-42.

The insect growth regulator (IGR) imidazole KK-42 induces hemolymph juvenile hormone esterase activity and precocious metamorphosis in Bombyx mori. As an initial step to understand the molecular action of KK-42, we isolated a full-length of juvenile hormone esterase cDNA from B. mori (BmJHE).