Abstract
By use of a spin label fatty acid, 5-doxylstearate, an increase in bulk membrane fluidity was observed after fertilization of two species of sea urchin eggs. Eggs partially activated by ammonia showed a similar effect. The data suggest that a structural change involving membrane lipids accompanies activation.
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Ammonia / pharmacology
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Animals
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Female
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Fertilization*
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Membrane Lipids / physiology*
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Membranes / physiology
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Ovum / drug effects
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Ovum / physiology*
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Sea Urchins
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Spin Labels
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Viscosity
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Zygote / physiology*
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Zygote / ultrastructure
Substances
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Membrane Lipids
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Spin Labels
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Ammonia