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第55号(2000-12-10) >

Please use this identifier to cite or link to this item: http://hdl.handle.net/11173/1393

Title: ニワトリ卵巣での卵成熟に伴う卵黄膜内層タンパク質の変化
Other Titles: Changes in Proteins Forming the Vitelline Membrane Inner Layer during the Ovum Maturation in the Hen Ovary
Authors: 橋本, 康代
Hashimoto, Yasuyo
木戸, 詔子
Kido, Shoko
Issue Date: 10-Dec-2000
Publisher: 京都女子大学食物学会
Abstract: To clarify the formation of the vitelline membrane, we investigated changes in the proteins constituting the inner layer of the vitelline membrane during the ovum maturation in the hen ovary.The vitelline membranes were isolated from yellow yolk follicles at the different growth stages, identified as F_1 to F_8,and their protein compositions were examined by SDS-PAGE in both the presence and the absence of reducing agent. One of the major glycoproteins found in the matured ovum, GP-I, appears to exist as monomer from the early stage of the yolk deposition (F_1). The other glycoprotein, GP-II, appears as protomer of its precursor with higher molecular weight at slightly later stage (F_3) and appears to be converted into the homodimeric form at later stages (F_7~F_8). Staining the gel for the carbohydrate moiety supports this notion. The GP-I fraction prepared from the vitelline membrane of the completed eggs was separated into two components, GP-Ia and GP- Ib, based on the pH dependence in their solubility. They have similar molecular weights but different elution volumes in cation-exchange chromatography. A similar but different heterogeneity in the GP- I fraction prepared from the follicle vitelline membrane was identified.These results indicate that proteins constituting the vitelline membrane, at least GP-I and GP-II, are processed to a great extent during the ovum maturation as well as after the ovulation.
URI: http://hdl.handle.net/11173/1393
Appears in Collections:第55号(2000-12-10)

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