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Structure of egg envelop proteins

1. Isolation of zona pellucida (ZP) proteins constituting the vitelline envelope of gilthead seabream oocytes. 3 new isoforms of zona pellucida (ZP) proteins were identified in gilthead seabream and found to have dual expression in liver and early oocytes. Further, the ZP proteins were found to be under estrogenic control in liver.
2. Determination of timing of gene expression and ZP deposition within the VE. Two Zp proteins were found to be translated in the early oocytes and the four ZP proteins were found to be unevenly distributed in the early VE.
3. Composition of VE from gilthead seabream and zebrafish. The relative amount of each ZP protein in the VE was quantified and we found that they were not present in equal amounts.

Reported by

OREBRO UNIVERSITY
DEPARTMENT OF NATURAL SCIENCES, OREBRO UNIVERSITY
701 82 OREBRO
Sweden
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