Vitellogenesis in Manduca sexta
Mem. Inst. Oswaldo Cruz
; 82(supl.3): 83-88, 1987. ilus, tab
Article
em En
| LILACS
| ID: lil-623743
Biblioteca responsável:
BR1.1
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.
Texto completo:
1
Índice:
LILACS
Assunto principal:
Manduca
Limite:
Animals
Idioma:
En
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
MEDICINA TROPICAL
/
PARASITOLOGIA
Ano de publicação:
1987
Tipo de documento:
Article
/
Congress and conference