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The Effects of Specific Antisera on the Cleavage of the Sea Urchin Egg


Brookbank, John Warren (1955) The Effects of Specific Antisera on the Cleavage of the Sea Urchin Egg. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/44DN-JR12.


Rabbit antisera against sea urchin unfertilized eggs (gelatinous coat removed), fertilized eggs and the gelatinous coat (fertilizin) of the unfertilized eggs have been found to inhibit the nuclear and cytoplasmic divisions of the fertilized egg. Antisera against whole sperm or sperm antifertilizin extracts were not effective in this regard, and absorption of the effective sera with sperm did not remove the blocking antibody of those sera. Extracts (calcium-free sea water) of whole fertilized eggs containing the ectoplasmic layer material were found to react with anti-egg sera after absorption with sperm, but not after absorption with eggs. This material in this extract has been tentatively described in this thesis as a carbohydrate. One such extract was found to agglutinate the sperm of the species, but not sand dollar sperm. Subsequent extracts have not shown this property. The respiration of fertilized eggs, blocked by the effective sera, was found to increase over the controls. The sodium content of fertilized eggs treated with immune blocking serum was not found to differ from the sodium content of eggs in normal serum. The tension at the surface of unfertilized eggs increases in the presence of anti-unfertilized egg serum, as judged by centrifugation experiments.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:(Embryology and Animal Physiology)
Degree Grantor:California Institute of Technology
Major Option:Biology
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Tyler, Albert
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 January 1955
Record Number:CaltechETD:etd-11242003-103345
Persistent URL:
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4646
Deposited By: Imported from ETD-db
Deposited On:24 Nov 2003
Last Modified:28 Jun 2023 18:25

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PDF (Brookbank_jw_1955.pdf) - Final Version
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