THE SYNTHESIS OF 5S RNA AND ITS REGULATION DURING EARLY SEA URCHIN DEVELOPMENT
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چکیده
منابع مشابه
Early cyclical changes in polyamine synthesis during sea-urchin development.
The polyamines, putrescine, spermidine, and spermine, undergo dramatic cyclical variation in both synthesis and accumulation during the early cleavage stages of sea-urchin development. Ornithine decarboxylase activity (putrescine synthesis) in developing Strongylocentrotus purpuratus exhibits maxima at •£• and 2 h after fertilization; increases in ornithine decarboxylase activity appear to corr...
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این پژوهش با هدف "بررسی وضعیت موجود آموزش عالی مجازی در ایران و راههای توسعه و ارتقای آن " و با روش توصیفی-تحلیلی و پیمایشی صورت پذیرفته است. بررسی اسنادو مدارک موجود در زمینه آموزش مجازی نشان داد تعداد دانشجویان و مقاطع تحصیلی و رشته محل های دوره های الکترونیکی چندان مطلوب نبوده و از نظر کیفی نیز وضعیت شاخص خدمات آموزشی اساتید و وضعیت شبکه اینترنت در محیط آموزش مجازی نامطلوب است.
Changing populations of messenger RNA during sea urchin development.
' Watson, J. D., and F. H. C. Crick, in Viruses, Cold Spring Harbor Symposia on Quantitative Biology, vol. 18 (1953), p. 123. 6Koch, A. L., and C. Miller, J. Theoret. Biol., 8, 71 (1964). 7 Fong, P., these PROCEEDINGS, 52, 641 (1964). 8 Dounce, A. L., J. Theoret. Biol., 2, 152 (1962). 9 Cavalieri, L. F., and B. J. Rosenberg, in Progress in Nucleic Acid Research, ed. J. N. Davidson and W. E. Coh...
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Sea urchin fertilization is marked by a massive conversion of molecular oxygen to hydrogen peroxide by a sea urchin dual oxidase, Udx1. This enzyme is essential for completing the physical block to polyspermy. Yet, its expression is maintained during development, as indicated by the presence of both Udx1 mRNA and Udx1 protein enriched at the surface of all non-mesenchymal blastomeres. When hydr...
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Effects of salinity on fertilization, embryonic stage, and early larval development and growth performances of short-spined white sea urchin, Salmacis sphaeroides were conducted under a controlled laboratory condition. The experiment was carried out with seven salinity treatments (15, 20, 25, 30, 35, 40 and 45 PSU), each of which was triplicated. Significantly highest fertilization success was ...
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ژورنال
عنوان ژورنال: Development, Growth and Differentiation
سال: 1979
ISSN: 0012-1592,1440-169X
DOI: 10.1111/j.1440-169x.1979.00099.x