The hemolymph juvenile hormone binding protein (JHBP) from Galleria mellonella contains two disulphide bridges/molecule and no free Cys residues. An alignment of primary structures of other Lepidopteran JHBPs indicates that Cys residues, equivalent to Cys10,17,151,195 in G. mellonella JHBP, maybe involved in -S-S- bridge formation.

The antennae of male Periplaneta americana acquire a large number of olfactory receptors at the adult stage. Electrophysiological methods (single unit and electroantennogram recording) show that a portion of the receptors added at the adult ecdysis are sex attractant receptors. Sex attractant receptors are not present in large numbers on larval and adult female antennae. The differentiation of ...

A convenient and simple method is presented for the synthesis of juvenile hormone-thyroglobulin conjugates. Methods previously described for this hapten linkage have used a two-step process in which a reactive intermediate was isolated and then used for conjugation. With the approach described here, an efficient, single-step conjugation reaction is effected between the carboxyl moiety of juveni...

Prolonged juvenile hypothyroidism results in a permanent loss in height that is related to the duration of thyroxine deficiency before adequate thyroxine replacement treatment. A 13 year old girl with severe juvenile hypothyroidism was studied prospectively. She had an undetectable serum thyroxine concentration, a height SD score of -6.6 SD, and a bone age of 5.8 years. The enlarged pituitary g...

Two juvenile hormones are isolated from organ cultures of corpora allata of the tobacco hornworm moth, Manduca sexta Johannson, and are purified by high-resolution liquid chromatography. These are identified as methyl (2E, 6E)-(10R)-10,11-epoxy-3,7,11-trimethyl-2,6-dodecadienoate, a new natural hormone, and methyl (2E,6E) - (10R,11S) - 10,11 - epoxy - 3,7,11 - trimethyl-2,6-tridecadienoate. [(1...

The aromatic beta-carboline norharmane was determined in workers, nymphs, and ergatoids of Reticulitermes speratus (Kolbe) (Isoptera: Rhinotermitidae) by gas chromatography/mass spectrometry. Norharmane levels in workers, nymphs, and ergatoids collected in May (approximately 4.3 ng/termite) were higher than those in November (approximately 0.2 ng/termite). Fluorescence of norharmane was observe...

Abbreviations: cAMP: cyclic Adenosine MonoPhosphate; cDNA: complimentary DNA; CHH: Crustacean Hyperglycemic Hormone; DA: Dopamine; EPA: Eicosapentaeinoic Acid; FSH: Follicle Stimulating Hormone; FTZ-F1: Fushi Tarazu-Factor1; GIH: Gonad Inhibiting Hormone; GSH: Gonad Stimulating factor; hCG: human Chorionic Gonadotropin; HP: Hepatopancreas; HPLC: High Performance Liquid Chromatography; 5-HT: 5-H...

The CAMP-dependent protein kinase (EC 2.7.1.37; ATP:protein phosphotransferase) inhibitor in Sertoli cell-enriched rat testis has been shown to be specifically stimulated by follicle-stimulating hormone in uiuo. Intraperitoneal injection of follicle-stimulating hormone (100 pg of NIH-FSH-S12) induced a significant increase in protein kinase inhibitor 8 h after injection. Maximal stimulation of ...

the sunn pest is a serious pest of cereals causing severe damage to cereals especially of wheat. its life cycle has two different phases, one is growth and development phase and the other is diapause phase which takes place in adult stage. in this study the effects of juvenile hormone analogue pyriproxyfen, ecdysone analogue methoxyfenozide and mixture of pyriproxyfen and methoxyfenozide on dia...

Juvenile hormone (JH) is an insect hormone containing an alpha,beta-unsaturated ester consisting of a small alcohol and long, hydrophobic acid. JH degradation is required for proper insect development. One pathway of this degradation is through juvenile hormone esterase (JHE), which cleaves the JH ester bond to produce methanol and JH acid. JHE is a member of the functionally divergent alpha/be...