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ECB-ART-52333
Dev Growth Differ 1976 Jan 01;183:195-198. doi: 10.1111/j.1440-169X.1976.00195.x.
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MICROPAPILLAE IN SEA URCHIN EGGS.

Afzelius BA .


Abstract
Sea urchin eggs fixed in a glutaraldehyde-calcium chloride mixture have "micropapillae" with a dense content. If these structures are real, they are likely to be sites where a fusion with the spermatozoon can take place. It is possible however that they represent some kind of preparation artefact without a structural counterpart in the living state.

PubMed ID: 37281943
Article link: Dev Growth Differ