共查询到20条相似文献,搜索用时 15 毫秒
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M. Krishna Rao J. V. Pantulu K. Jayalakshmi 《Cellular and molecular life sciences : CMLS》1979,35(9):1154-1155
Summary Effect of B-chromosomes on the duration of the mitotic cycle was studied by a colchicine shock method in the root-tip cells of pearl millet (Pennisetum typhoides). 3 B-chromosomes were found to have very little effect, whereas 5 B-chromosomes resulted in an increase of the duration by about 39%.This investigation was financed by the University Grants Commission, New Delhi. 相似文献
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Purified epidermal G2 chalone does not inhibit DNA synthesis or influx of S-phase cells and is therefore cell cycle phase-specific, inhibiting only the flow of cells into M-phase. 相似文献
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E. Megory F. Konikoff J. Ishay L. Barr-Nea 《Cellular and molecular life sciences : CMLS》1977,33(5):634-635
Summary Hypergravity affects the estrous cycle of rats. It is prolonged by a force of 1.39G–1.65G, and shows irregularities between 1.02 and 1.19G. Rats centrifuged for 40 days and returned to normal gravity presented a normal estrous pattern. 相似文献
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Mammalian target of rapamycin (mTOR) is a protein serine/threonine kinase that controls a wide range of growth-related cellular
processes. In the past several years, many factors have been identified that are involved in controlling mTOR activity. Those
factors in turn are regulated by diverse signaling cascades responsive to changes in intracellular and environmental conditions.
The molecular connections between mTOR and its regulators form a complex signaling network that governs cellular metabolism,
growth and proliferation. In this review, we discuss some key factors in mTOR regulation and mechanisms by which these factors
control mTOR activity. 相似文献