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Biology of Reproduction, Vol 25, 399-411, Copyright © 1981 by Society for the Study of Reproduction

Changes in the Zonae Pellucidae and Plasmalemmae of Aging Mouse Eggs

FRANK J. LONGO 1

1 Department of Anatomy, University of Iowa, Iowa City, Iowa 52242


Studies were carried out to investigate alterations in the zonae pellucidae and plasma membranes of aging mouse eggs. Differences were apparent in the zonae pellucidae of aging ova when examined with scanning electron microscopy and when their susceptibility to digestion with agr-chymotrypsin was investigated. Changes in the plasma membranes of aging eggs were demonstrated by concanavalin A binding and alcian blue staining. These alterations in the zonae pellucidae and plasma membranes of aging mouse ova may be related to previously demonstrated age-dependent reductions in ovum fertility.

Note:
ACKNOWLEDGMENTS The assistance of Mr. Fred So and Mr. Harrison M. Brooks during the course of this investigation is greatly appreciated. This work was supported by a grant from the NIH.

Submitted on March 30, 1981
Accepted on April 28, 1981




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Copyright © 1981 by the Society for the Study of Reproduction.