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On the effect of adenosine triphosphoric acid and of Ca on the cytoplasm of the egg of the sea urchin, Psammechinus miliaris☆
The curves obtained demonstrate that the rate of stratification is determined rather by rigidity of structure than by viscosity, probably by increasing the linkage between certain components of the cytoplasmic fabric. Expand
SECTION OF BIOLOGY: SOME EFFECTS OF ADENOSINE TRIPHOSPHATE ON THE CYTOPLASMIC STATE, DIVISION, AND DEVELOPMENT OF THE SEA URCHIN EGG*
On the influence of ATP on the fertilization and segmentation of the sea urchin egg, Strongylocentrotus lividus
The cortical propagation of the activation impulse in the sea urchin egg
It was inferred that the impulse caused by the sperm attachment primarily spreads in the cortical layer, and the primary action of the spermatozoon is considered to be propagated by a chain reaction, in which activateable units present in the cortex are concerned. Expand
Action of periodate on the surface reactions attending the activation of the egg of the sea urchin, Psammechinus miliaris☆
It is inferred that underripeness is caused by the predominance of an inhibitor having a character similar to that of the jelly coat substance, and the belief is expressed that the inhibitory agent is deeply engaged in the whole activation process. Expand
Animalizing action of iodosobenzoic acid in the sea urchin development
The activation of the egg of the sea urchin Psammechinus miliaris by periodate
The activation of the eggs by periodate occurred even in absence of Ca, and eggs activated subsequent to the periodate treatment exhibited the angular plasmolysis characteristic of fertilized eggs when immersed in a hypertonic medium. Expand
The effect of iodoacetamide on fertilization and division of the sea urchin egg
The gelating effect of lower doses of trypsin on sea urchin eggs and its removal by exposure to glutathione.
The results indicate that the trypsin pretreatment promotes the activation of proteolytic enzymes present in the eggs, including glutathione, which has a gelating or polymerizing action on certain cytoplasmic components. Expand
[Centrifuge studies of the effect of periodate on the condition of the plasma membrane and cytoplasm of sea urchin eggs].
- G. Kriszat
- Biology, Medicine
- Experimental cell research
- 1 October 1956