LOCALIZATION AND SEGREGATION OF MATERNAL RNA'S DURING EARLY CLEAVAGE OF XENOPUS LAEVIS EMBRYOS
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چکیده
منابع مشابه
Intracellular Calcium and Cell Cleavage in Early Embryos of Xenopus Laevis
There is growing evidence that cell cleavage involves contraction in the region of the furrow and relaxation above the most distant parts of the spindle (see references 15 and 16) . The contractile mechanism has been likened to that of muscle, mainly as a result of studies of glycerinated models of dividing cells (7, 9) and extraction of an actomyosin-like material (8, 11) . Muscular contractio...
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The amount of intact 40S rRNA precursor was followed by Northern hybridization in the course of the early embryogenesis of wild-type Xenopus laevis and its anucleolate mutant. The total amount of 40S rRNA precursor did not alter appreciably until the midblastula stage, decreased at the late blastula stage, and then increased. In the anucleolate mutant, in which no rRNA synthesis occurs, the 40S...
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RNA metabolism during amphibian oogenesis has been investigated by the analysis of individual cDNA cloned sequences. Two cDNA clone libraries were constructed from the pA+ RNA of Xenopus ovary and of tadpole. The accumulation of RNAs complementary to individual clones was examined during oogenesis by isolating RNA from oocytes of different stages. There are only two patterns of accumulation dur...
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Embryos of Xenopus laevis reared in media with various low (less than or equal to 10(-5) M) magnesium ion concentrations will exhibit differing degrees of a potentially lethal magnesium starvation syndrome depending on the ion concentration and rearing temperature. The higher the rearing temperature or the lower the magnesium ion content of the medium the more severely the syndrome will be expr...
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ژورنال
عنوان ژورنال: Development, Growth and Differentiation
سال: 1981
ISSN: 0012-1592,1440-169X
DOI: 10.1111/j.1440-169x.1981.00023.x