Meiotic maturation in Xenopus oocytes: a link between the cessation of protein secretion and the polarized disappearance of Golgi apparati.
作者： A Colman , E A Jones , J Heasman
关键词: Ovalbumin 、 Molecular biology 、 Prophase 、 Cell biology 、 Secretion 、 Biology 、 Xenopus 、 Golgi apparatus 、 Metaphase 、 Oocyte 、 Oviduct
摘要: We have studied the relationship between timing of late meiotic events that occur during progesterone-induced oocyte maturation, and intracellular protein transport. monitored secretion chick oviduct proteins from Xenopus laevis oocytes microinjected with polyadenylated mRNA found ovalbumin lysozyme are not secreted second metaphase, in contrast to earlier prophase stage. Maturation had no detectable effect on glycosylation ovalbumin, whereas it affected ovomucoid. As maturation proceeded, Golgi apparati disappeared a polarized fashion, beginning vegetal half. This disappearance coincided temporally spatially nuclear envelope. speculate apparatus block causally related.
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