Sea urchin eggs
Extracellular heat shock protein 70 has novel functional effects on sea urchin eggs and coelomocytes
... the sea urchin – eggs and coelomocytes – we found that both responded to exogenous Hsc70 and Hsp70 by showing significant alterations in fundamental ...the sea urchin egg and ...
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I Studies on alkaline phosphatase activity in developing sea urchin embryos II Studies on the activation of protein biosynthesis in sea urchin eggs at fertilization
... Hist.ochemical studies of alkaline phosphatase in developing sea urchin eggs indicated that the enzyme was distributed uniformly throughout the unfertilized and ~ertilized eggs, and clea[r] ...
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Contributions of suboolemmal acidic vesicles and microvilli to the intracellular Ca2+ increase in the sea urchin eggs at fertilization
... Sea urchin eggs were fixed in FSW containing 0.5 % glutaraldehyde for 1 hour. Samples were then post-fixed with 1 % osmium tetroxide and dehydrated in a series of ethanol solutions of increasing ...
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Assessment of sperm chemokinesis with exposure to jelly coats of sea urchin eggs and resact: a microfluidic experiment and numerical study
... Prior work: experiments and analytical studies Motion of sperm toward eggs, and white blood cells toward infections (Kirkman-Brown et al., 2003), are all examples of known chemotactic phenomena, but perhaps the ...
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Mechanisms underlying the generation and propagation of the fertilization calcium wave in sea urchin eggs
... activate eggs spontaneously in a manner insensitive to either inhibitors of the InsPj and ryanodine ...the sea urchin does not act through the InsP^ or ryanodine receptor how might it act? One ...
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ACID PRODUCTION AFTER FERTILIZATION OF SEA-URCHIN EGGS A RE-EXAMINATION OF THE LACTIC ACID HYPOTHESIS
... DISCUSSION The experiments described in this paper show that there is a marked difference between the eggs of Echinus esculentus and Hemicentrotus pulcherrimus in regard to a the quantit[r] ...
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Cleavage of Sea Urchin Eggs in Colchicine
... Polarized light observations show that cleavage can take place when the asters and spindle have completely disappeared, provided the cell has reached midanaphase, by which time the chrom[r] ...
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The Respiratory and Glycolytic Enzymes of Sea Urchin Eggs
... Activity corresponding to phosphoglucomutase, phosphohexoisomerase, aldolase, triosephosphate dehydrogenase, enolase and lactic dehydrogenase has been demonstrated in homogenates prepare[r] ...
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Microdissection Experiments on Sea Urchin Eggs at Cleavage
... TEARING ONE BLASTOMERE OF A CLEAVING EGG Chambers 1938 described a microdissection experiment in which he tore open one blastomere at a dumb-bell stage in Arbacia punctulata eggs which w[r] ...
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The Metabolism of Fertilized and Unfertilized Sea Urchin Eggs
... This point might be clarified by examining the inhibitory action of HCN on unfertilized eggs in the dark, in the presence of CO, but at a sufficiently low partial pressure to avoid CO in[r] ...
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The Effect of Phlorizin on the Metabolism of Cytolysing Sea urchin Eggs
... If a suspension of unfertilized eggs is shaken in a manometer in the presence of saponin, four types of eggs may be recovered: 1 eggs which appear normal though they cannot be fertilized[r] ...
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Pursuing the impossible: an interview with Tim Hunt
... like sea urchins and clams, and nobody cares about sea urchins or clams, and then Urechis, and that’s even more ...from sea urchin eggs, and once he had a clone for sea ...
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Surface Characters of Dividing Cells
... In the grasshopper spermatocytes no further movement takes place after division, while in sea-urchin eggs a marker attached to the stationary ring, in spite of the fact that it has remai[r] ...
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ERK1 activation is required for S phase onset and cell cycle progression after fertilization in sea urchin embryos
... and sea urchin (Chiri et ...oocytes, sea urchin eggs rest in interphase of the first mitotic cell cycle as they await ...in sea urchin eggs immediately after ...
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The Mechanical Properties of the Cell Surface
... SUMMARY Measurements were made with the cell elastimeter on the effect of a number of reagents and of changes in pH on the rigidity of the cell membrane of unfertilized sea-urchin eggs..[r] ...
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The Lipids of Sea Urchin Semen
... The component fatty acids of the non-phospholipid fraction indicate that this portion of the total lipids conforms to the general character of marine oils by virtue of the low saturated [r] ...
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The Metabolism of the Sea Urchin Egg
... The evidence for the operation of a tricarboxylic acid cycle in the eggs of Echinus esculentus is: a the inhibition of endogenous O2 uptake of homogenates by malonate; b the stimulation [r] ...
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The Fertilization Reaction in the Sea Urchin
... When, as in these experiments, eggs are allowed to interact with spermatozoa for known times, and then functionally separated by immersion in hypotonic sea water, some eggs, presumably t[r] ...
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The Fertilization Reaction in the Sea Urchin
... Theoretically, there must therefore be a change in the form of the curve relating the proportion of polyspermic eggs to the time of contact with the spermatozoa, because at t = T, the co[r] ...
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The Propulsion of Sea Urchin Spermatozoa
... Bearing in mind the above limitations it seems, nevertheless, remarkable that the forward speed of propulsion of a spermatozoon can be calculated well within the limits of experimental e[r] ...
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