Animal cells and systems

  • 제1권2호
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  • Pages.341-344
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  • 1997
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  • 1976-8354(pISSN)
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  • 2151-2485(eISSN)
한국통합생물학회 (The Korean Society for Integrative Biology)
권호 표지

Receptor-mediated Transport of Vitellogenin during Oogenesis of a Polychaete, Pseudopotamilla occelata

  • 발행 : 1997.06.01
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초록

Receptor-mediated endocytosis has been suggested for a stage-specific transport mechanism of vitellogenin into the oocytes of a sabellid poly chaete, Pseudopotamilla occelata. Membrane proteins of oocytes of three size classes, including small (30-70 $\mu\textrm{m}$ in diameter), intermediate (70-140 $\mu\textrm{m}$ in diameter) and large (180-200 $\mu\textrm{m}$ in diameter), showed a atage-specific variation. Coelomic fluid proteins (CP), ass$\mu\textrm{m}$ed to be vitellogenin, consists of several proteins, which showed quite a different pattern from that of yolk proteins. Incorporation of $^{125}I$-CP into the oocytes of the intermediate size class almost linearly increases with time, showing a contrast to the pattern of the large size class, in which the incorporation is low and approaches a plateau, suggesting the vitellogenin transports by a regulated process only in the intermediate size class. Vitellogenin receptor proteins were identified to be 60 kDa and 68 kDa only in the intermediate size class by a ligand blotting test.

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참고문헌

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