title: Fertilization-induced changes in membrane fluidity of sea urchin eggs.
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.
mesh_terms: D000641:Ammonia / Q000494:pharmacology; D000818:Animals; D005260:Female; D005306:Fertilization; D008563:Membrane Lipids / Q000502:physiology*; D008566:Membranes / Q000502:physiology; D010063:Ovum / Q000187:drug effects / Q000502:physiology*; D012617:Sea Urchins; D013113:Spin Labels; D014783:Viscosity; D015053:Zygote / Q000502:physiology* / Q000648:ultrastructure
chemical_list: D008563:Membrane Lipids; D013113:Spin Labels; D000641:Ammonia