Cells’ Perception of Position in a Concentration Gradient
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چکیده
منابع مشابه
Cells’ Perception of Position in a Concentration Gradient
Wellcome CRC Institute source of the signal. Tennis Court Road To prove that a signal functions as a morphogen, it Cambridge CB2 1QR must be demonstrated that: (1) cells respond directly to and Departments of Zoology and Genetics the extracellular signaling molecule in question, and (2) University of Cambridge the cells display at least two qualitatively different Cambridge responses, apart fro...
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Xenopus blastula cells show a morphogen-like response to activin by expressing different genes according to the concentration of activin to which they are exposed. To understand how cells recognize their position in a concentration gradient, it is essential to know whether each cell responds individually to activin concentration. An alternative idea, proposed by previous work, is that cells nee...
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In this work, the concentration gradient (CG) analysis of local-scale exploration for Porphyry-Cu deposits is applied in two zones using the G(Vz) index (CG(Zn*Pb)/CG(Cu*Mo)). The first zone is covered by a 1:2000 map of the Sungun and Astamal areas in NW Iran and the second one in the Inza area in British Columbia, Canada. The rock samples are taken from Sungun and Astamal and the soil samples...
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In a recent paper, Evelyn I. Fernald 1 has shown that the osmotic concentration of the sap of different portions of stems is correlated with the tendency of buds to develop on those portions. She has found by freezing point measurements on the expressed sap that in actively growing stems of privet, chestnut, Pkiladelphus, and Bryophyllum there is a concentration gradient, the highest concentrat...
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ژورنال
عنوان ژورنال: Cell
سال: 1998
ISSN: 0092-8674
DOI: 10.1016/s0092-8674(00)81747-x