Results 211 to 220 of about 19,857 (270)

Maintaining sexual identity in adult flies is an ongoing commitment. [PDF]

PLoS Biol
Kopp A.
europepmc   +1 more source

Apical-basal polarity regulates Collagen IV-dependent cell-cell adhesion in theDrosophilaadipose tissue

Almasoud J, Andrieu C, Lee BH, Franz A.
europepmc   +1 more source

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Ecdysone metabolism: Ecdysone dehydrogenase‐isomerase

Lipids, 1974
AbstractAn enzyme system that converts α‐ecdysone to its hormonally less active 3α‐epimer was detected only in the midgut of the tobacco hornworm,Manduca sexta (L.). This system appears to be specific for the ecdysones and may represent a metabolic control point for regulating molting hormone activity.
H. N. Nigg, J. A. Svoboda, M. J. Thompson, J. N. Kaplanis, S. R. Dutky, W. E. Robbins   +5 more
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Biosynthesis of ecdysone and ecdysone phosphates in spinach

Phytochemistry, 1994
Abstract The polar ecdysteroid conjugate, ecdysone phosphate (2β,3β,14α,22R,25-pentahydroxy-7-en-6-one-3- phosphate) was identified in excised first leaves of spinach, where it is endogenously produced during 20- hydroxyecdysone biosynthesis. Radiolabelled [14C]ecdysone phosphate was isolated from several excised leaf assays and was hydrolysed with ...
Robert J. Grebenok, Sudha Venkatachari, John H. Adler   +2 more
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Conversion of α-Ecdysone to β-Ecdysone by Crustaceans and Insects

Nature, 1969
SINCE Karlson1 isolated α-ecdysone from silkworm pupae, other workers have isolated and identified three more ecdysones—β-ecdysone (crustecdysone)2, 26-hydroxy-β-ecdysone3 and 2-deoxy-β-ecdysone4—in extracts of insects and crustaceans. Additional types of ecdysones will probably be described when other species of arthropods are closely examined, as ...
D S, King, J B, Siddall
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Nonsteroidal Ecdysone Agonists

2005
Nonsteroidal ecdysone agonists are novel compounds that have become attractive candidates not only as pest control agents in agriculture but also as tools for research. Their narrow spectrum of activity makes them relatively safe as pesticides, and their mode of action as ligands for gene expression has found application in gene therapy and inducing ...
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Ecdysone Oxidase in Insects

Hoppe-Seyler´s Zeitschrift für physiologische Chemie, 1978
The occurrence of the enzyme ecdysone oxidase was demonstrated in several insect species. In blowflies it was detected mainly in eggs and pupae. The enzyme activity in blowflies varies during development parallel to the ecdysteroid content. This suggests a specific but presently unknown function of the enzyme. Ecdysone oxidase was located mainly in the
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On ecdysone-binding proteins and ecdysone-like material in nematodes

International Journal for Parasitology, 1977
Abstract Homogenates of Panagrellus redivivus and extracts of P. redivivus, Aphelenchus avenae and Haemonchus contortus were examined for ecdysone-binding proteins and ecdysone-like material, respectively. Sucrose density-gradient centrifugation, polyacrylamide gel electrophoresis and charcoal-dextran-binding assay failed to detect ecdysone ...
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Gas chromatographic analysis of ecdysone

Experientia, 1970
Nous avons developpe une methode d'analyse micro-quantitative de l'ecdysone (hormone de la mue des insectes) par Chromatographie gazeuse. Elle permettera l'analyse chimique de l'ecdysone, qui a ete dosee jusqu'a present par des methodes biologiques.
M, Katz, Y, Lensky
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Ecdysone-regulated puff genes 2000

Insect Biochemistry and Molecular Biology, 2002
The Ashburner model for the hormonal control of polytene chromosome puffing has provided a strong foundation for understanding the basic mechanisms of steroid-regulated gene expression (Cold Spring Harbor Symp. Quant. Biol. 38 (1974) 655). According to this model, the steroid hormone 20-hydroxyecdysone (referred here as ecdysone) directly induces the ...
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