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Vitellogenesis in Manduca sexta
Kawooya, John K; Osir, Ellie O; Law, John H.
  • Kawooya, John K; The University of Arizona. Department of Biochemistry. Tucson. US
  • Osir, Ellie O; International Centre for Insect Physiology and Exology. Nairobi. KE
  • Law, John H; The University of Arizona. Department of Biochemistry. Tucson. US
Mem. Inst. Oswaldo Cruz ; 82(supl.3): 83-88, 1987. ilus, tab
Artículo en Inglés | LILACS | ID: lil-623743
ABSTRACT
Eggs of Manduca sexta contain four well-characterized protein derived from hemolymph vitellogenin and lipophorin (very high density lipoproteins); microvitellogenin, a 26,000 dalton female-specific protein lacking lipid and carbohydrate, and insecticyanin, a blue biliprotein composed of four identical 22,000 dalton subunits. In addition, eggs contain a large store of triacyl glycerols. It has been shown that vitellogenin and lipophorin are actively taken up by follicles in vitro. The lipid components of these two proteins together account for only 10% of egg lipid. The follicle actively sequesters intact high density lipophorin, which, inside the oocyte, is stripped of much of its neutral lipid and two molecules of apolipophorin III. On the other hand, low density lipophorin donates diacylglycerol to the oocyte without its protein components being sequestered. Most of the egg lipid is transported from the fat body by a shuttle system involving low density lipophorin.
Asunto(s)

Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Manduca Límite: Animales Idioma: Inglés Revista: Mem. Inst. Oswaldo Cruz Asunto de la revista: Medicina Tropical / Parasitología Año: 1987 Tipo del documento: Artículo / Congreso y conferencia País de afiliación: Kenia / Estados Unidos Institución/País de afiliación: International Centre for Insect Physiology and Exology/KE / The University of Arizona/US

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Manduca Límite: Animales Idioma: Inglés Revista: Mem. Inst. Oswaldo Cruz Asunto de la revista: Medicina Tropical / Parasitología Año: 1987 Tipo del documento: Artículo / Congreso y conferencia País de afiliación: Kenia / Estados Unidos Institución/País de afiliación: International Centre for Insect Physiology and Exology/KE / The University of Arizona/US