Ion Transport Peptides and Crustacean Hyperglycemic Hormones

Insect ITPs belong to a large family of peptides that are prominent in crustacean physiological functions crustacean hyperglycemic hormones (CHHs), molt inhibiting hormones (MIHs), vitellogenesis inhibiting hormones (VIHs), and mandibular organ inhibiting hormones (MOIHs) (reviews de Kleijn et al., 1998 Van Herp, 1998 Webster, 1998 see also Chapter 3.16). As their names indicate, these large peptides regulate various functions including water homeostasis, energy mobilization, vitellogenesis,...

Natural and Peptide Induced Behaviors in Drosophila

Contraction Posture Old

Larval and pupal ecdyses The first detailed study of larval ecdysis in Drosophila described morphological markers and a series of stereotypic physiological and behavioral events preceding the transition from first to second instar (Park et al., 2002a). About 60 min in advance of ecdysis, a new set of mouthparts for the second instar become visible adjacent to those of the first instar, leading to the appearance of ''double mouth hooks.'' The appearance of ''double vertical plates''...