Evidence for Involvement of the Exudate Released from the Egg Cortex in the Change in Chorion Proteins at the Time of Egg Activation in Oryzias latipes
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概要
- 論文の詳細を見る
In eggs of the medaka Oryzias latipes, we recently found that the changes in chorion proteins that occur upon fertilization could be induced in vitro by an egg exudate including cortical alveolar contents. In the present study, the time course of the changes in chorion proteins induced in vitro by egg exudate was examined by SDS-PAGE analysis and was found to be quite similar to that of in vivo chorion hardening at the time of fertilization. The activity of egg exudate was dose-dependent. Moreover, when the exudate was heated for 30 min at 60℃, it lost its activity. On the other hand, in heat-treated chorions, the intermediate proteins appeared following incubation with egg exudate, although chorion hardening did not occur. These results suggest the presence of a chorion protein-modifying enzyme(s) in the exudate released from the cortex during egg activation in Oryzias latipes.
- 社団法人日本動物学会の論文
- 1996-04-15
著者
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Shibata Yasushi
Lab. Reproductive Biology National Institute For Basic Biology
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Shibata Yasushi
Department Of Agricultural Chemistry Faculty Of Agriculture Yamaguchi University
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Iwamatsu Takashi
Department Of Biology Aichi University Of Education
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