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Biology of Reproduction, Vol 11, 558-565, Copyright © 1974 by Society for the Study of Reproduction

Comparative Solubility Properties of the Zonae Pellucidae of Unfertilized and Fertilized Mouse Ova

MASATO INOUE 1, and DON P. WOLF 1

1 Division of Reproductive Biology, Department of Obstetrics and Gynecology, and Department of Biophysics, University of Pennsylvania, School of Medicine, Philadelphia, Pennsylvania 19174


The solubility properties of the murine zona pellucida surrounding unfertilized eggs and 2-cell embryos have been investigated. Unfertilized zonae pellucidae were consistently more readily dissolved than those from 2-cell embryos in 2-mercaptoethanol, sodium periodate, and acidic solutions. No differences were observed when the solubility properties of zonae from 2-cell embryos fertilized in vivo were compared with those fertilized in vitro. The oviduct, therefore, does not appear to contribute to zonae solubility changes. Procedures are now available which will allow an assessment of the physiological importance of alterations in solubility properties of the zona pellucida at fertilization.

Accepted on July 23, 1974




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Copyright © 1974 by the Society for the Study of Reproduction.