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- W2073394920 abstract "The corpus allatum (CA) is required for vitellogenesis in the blood-sucking reduviid, Triatoma protracta, as seen by the total lack of yolk deposition in allatectomized females. Normally the CA becomes active within a day after emergence. After a period of activity during which unfed virgins may mature a few eggs, the CA is inhibited via its neural connectives from the brain. The CA is activated by mating, while a blood meal provides an additional stimulus for vitellogenesis. If the ventral nerve cord (VNC) is severed within 48 hr after copulation, the mating stimulus does not get through. However, the pathway of the feeding stimulus does not involve the VNC. The brain does not have any allatotropic or gonadotropic function in this species.A female-specific protein (vitellogenin) was identified by immunoelectrophoresis in the haemolymph of egg-maturing females. This protein is taken up by the oocytes immunologically unaltered and forms the bulk of the yolk. Allatectomy at emergence prevents the appearance of the vitellogenin, and the topical application of JHIII to allatectomized females led to its synthesis de novo, as shown by the incorporation of labelled precursors into vitellogenin. From its mobility in polyacrylamide gels of different concentrations, the molecular weight of the yolk protein is estimated to be 4.37 × 105 daltons." @default.
- W2073394920 created "2016-06-24" @default.
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- W2073394920 date "1977-01-01" @default.
- W2073394920 modified "2023-09-25" @default.
- W2073394920 title "Endocrine control of vitellogenin synthesis and vitellogenesis in Triatoma protracta" @default.
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- W2073394920 doi "https://doi.org/10.1016/0022-1910(77)90007-5" @default.
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