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Journal of Cell Science, Vol 35, Issue 1 67-85, Copyright © 1979 by Company of Biologists

JOURNAL ARTICLES

The quantitative measurement of electrolyte elements in nuclei of maturing erythrocytes of chick embryo using electron-probe X-ray microanalysis

RT Jones, RT Johnson, BL Gupta and TA Hall

Na, K and Cl measurements have been made on frozen sections of chick red blood cells throughout embryonic development, using electron-probe microanalysis. There is an apparent fluctuation in the levels of these elements during maturation, although the Na/K ratio remains fairly constant. The nuclear Na concentration resembles that of the cytoplasm, rather than that of the medium, at all stages. Inhibitor studies indicate that when cytoplasmic Na, K and Cl levels are altered, their corresponding nuclear levels are similarly affected. Additionally, the measurements in nuclei isolated in anhydrous media from lyophilized cells have shown artefactual accumulation of high Na, K, Ca and Mg.


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J. F. Hoffman and J. P. Geibel
Fluorescent imaging of Cl- in Amphiuma red blood cells: How the nuclear exclusion of Cl- affects the plasma membrane potential
PNAS, January 18, 2005; 102(3): 921 - 926.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 1979