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  • Food Science, Agricultural, Medicinal and Pharmaceutical Chemistry  (3)
  • Wiley-Blackwell  (3)
  • American Meteorological Society (AMS)
  • 1
    Electronic Resource
    Electronic Resource
    Metabolism of parasitized Manduca sexta examined by nuclear magnetic resonance (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Archives of Insect Biochemistry and Physiology 13 (1990), S. 127-143 
    Details
    ISSN: 0739-4462
    Keywords: Cotesia congregata ; NMR ; 13C ; fat body metabolism ; pyruvate ; Krebs cycle ; lipogenesis ; Chemistry ; Food Science, Agricultural, Medicinal and Pharmaceutical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Metabolism of fifth instar Manduca sexta larvae was significantly altered during parasitization by Cotesia congregata. The in vivo 13C natural abndance spectrum and histological examination of the fat body demonstrated significantly reduced fat levels and increased deposition of glycogen in parasitized insects. 1H NMR analysis demonstrated that the free amino acid level was reduced in the hemolymph of parasitized larvae, but control and parasitized insects had similar levels of trehalose. [13C]2-pyruvate injected into the dorsal vessel was incorporated into numerous metabolites including amino acids, Krebs cycle intermediates, trehalose, and fat. In control larvae pyruvate was incorporated primarily into fat following oxidation to CoASAc. Pyruvate was metabolized slower in parasitized larvae and following decarboxylation to oxaloacetate was metabolized by Krebs cycle and incorporated into amino acids. Only small amounts of trehalose were synthesized from pyruvate in control and parasitized larvae and glycogen synthesis was not observed. Analysis of hemolymph indicated no net synthesis of glucose by gluconeogenesis. Control and parasitized larvae incorporated [13C]1-glucose primarily into trehalose. Control larvae also synthesized fat from gulcose. In contrast, fat synthesis was not observed in parasitized insects which incorporated glucose into glycogen. Differences in glucose metabolism, therefore, appeared to explain the difference in storage metabolite levels between control and parasitized larvae.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/arch.940130112
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  • 2
    Electronic Resource
    Electronic Resource
    Biochemical and immunological studies on an α-glycerophosphate dehydrogenase from the tephritid fly, Anastrepha suspensa (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Archives of Insect Biochemistry and Physiology 4 (1987), S. 271-286 
    Details
    ISSN: 0739-4462
    Keywords: tephritid ; immunological studies ; biochemical studies ; Chemistry ; Food Science, Agricultural, Medicinal and Pharmaceutical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A rapid and efficient procedure has been developed for the purification of α-glycerophosphate dehydrogenase from the tephritid fly Anastrepha suspensa. This procedure is applicable to the isolation of the enzyme from other tephritids. The A. suspensa α-glycerophosphate dehydrogenase is dimeric with a molecular weight of 70,000 and a subunit molecular weight of 35,000. The pH optimum of the enzyme is 7.0. The amino acid composition is compared with that of other α-glycerophosphate dehydrogenases. By means of the quantitative microcomplement fixation procedure the A. suspensa α-glycerophosphate dehydrogenase is compared immunologically to a variety of other tephritid and dipteran α-glycerophosphate dehydrogenases.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/arch.940040405
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  • 3
    Electronic Resource
    Electronic Resource
    Actions of a coral toxin analogue (bipinnatin-B) on an insect nicotinic acetylcholine receptor (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Archives of Insect Biochemistry and Physiology 23 (1993), S. 155-159 
    Details
    ISSN: 0739-4462
    Keywords: lophotoxin analogue ; identified neurone ; fast coxal depressor motor neurone ; cockroach Periplaneta americana ; Chemistry ; Food Science, Agricultural, Medicinal and Pharmaceutical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: The lophotoxin analogue, bipinnatin-B, is a potent neurotoxin isolated from the gorgonian coral Pseudopterogorgia bipinnata. When tested on the cell body of an identified motor neurone, the fast coxal depressor motor neurone (Df) in the cockroach metathoracic ganglion, bipinnatin-B, at concentrations of 10 μM, partially blocked nicotine-induced depolarization. Blockade of the response to nicotine was almost complete at 30 μM bipinnatin-B, and was partially reversible on rebathing the preparation in normal saline. Responses of the same neurone to GABA were unaffected by 30 μM bipinnatin-B. © 1993 Wiley-Liss, Inc.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/arch.940230402
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