ANTIGENS IN EGGS AND DEVELOPMENTAL STAGES OF THE SEA URCHIN
نویسندگان
چکیده
منابع مشابه
Antigens in Eggs and Developmental Stages of the Sea Urchin
A number of antigens in unfertilized eggs and embryos of the sea urchin Paracentrotus lividus were characterized with respect to both immunological and physicochemical properties. Experiments involved single diffusion in agar (Oudin technique) combined with mutual dilution, serial dilution, and heating of antigenic extracts, as well as immunoelectrophoresis with normal and heated extracts and a...
متن کاملDetermination of developmental stages of embryo in the Sea Urchin, Echinometra mathaei
Sea Urchin is one of the most useful tools in developmental biology studies because this organism has the simplest kind of developmental stages. We aimed to determine developmental stages and timetable of Echinometra mathaei embryo (the species of Persian Gulf). The spawning of E. mathaei was induced by 0.5M KCl injection (1ml) into the coelomic cavity. After fertilization, embryos were placed ...
متن کاملDetermination of developmental stages of embryo in the Sea Urchin, Echinometra mathaei
Sea Urchin is one of the most useful tools in developmental biology studies because this organism has the simplest kind of developmental stages. We aimed to determine developmental stages and timetable of Echinometra mathaei embryo (the species of Persian Gulf). The spawning of E. mathaei was induced by 0.5M KCl injection (1ml) into the coelomic cavity. After fertilization, embryos wer...
متن کاملAction 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...
متن کاملCleavage of Sea-urchin Eggs in Colchicine
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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ژورنال
عنوان ژورنال: The Journal of Biophysical and Biochemical Cytology
سال: 1961
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.9.1.93