Identification of a Juvenile Hormone of a Primitive Insect, the Firebrat,Thermobia domestica(Thysanura)

Abstract
SYNOPSIS. Juvenile hormone, JH-I was identified as the major juvenile hormone of a primitive insect, the firebrat, Thermobia domestica (Thysanura, Lepismatoidea). Since the same molecule is also present in Orthoptera, Lepidoptera and Diptera, its presence in Thysanura indicates that the juvenile hormones are ancient molecules and have undergone little variation during the evolution of the class Insecta.

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