Stable, resealable pores formed in sea urchin eggs by electric discharge (electroporation) permit substrate loading for assay of enzymes in vivo.
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study of cohesive devices in the textbook of english for the students of apsychology by rastegarpour
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Action of Colcemid in Sea Urchin Eggs
The effects of Colcemid, the deacetyl-N-methyl derivative of colchicine, on the eggs of Arbacia punctulata were investigated. Colcemid in concentrations of 2.7 x 10(-5)M or greater blocks syngamy (the fusion of the pronuclei) in these eggs. Although a tenfold decrease in concentration of Colcemid usually permits the pronuclei to fuse, the subsequent division is blocked. In the sea urchin egg, t...
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INTRODUCTION We have recently put forward a theory linking mitosis with cleavage, in which we suggest that cleavage is caused by an expansion of the cell cortex which starts at either pole of the cell and later moves round to the region of the furrow (Mitchison, 1952). There is evidence that this expansion is brought about by substances diffusing from the two groups of daughter chromosomes whic...
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in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...
15 صفحه اولDynein isoforms in sea urchin eggs.
Biochemical and immunological analysis of unfertilized sea urchin eggs has revealed the presence of at least two distinct isoforms of cytoplasmic dyneins, one soluble and the other microtubule-associated. The soluble enzyme is a 20 S particle with a MgATPase activity that can be activated 5-fold by nonionic detergents. It contains heavy chain polypeptides that 1) comigrate with the dynein heavy...
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ژورنال
عنوان ژورنال: Cell Regulation
سال: 1989
ISSN: 1044-2030
DOI: 10.1091/mbc.1.1.65