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The Journal of Cell Biology, Vol 69, 210-214, Copyright © 1976 by The Rockefeller University Press

ARTICLES

Intranuclear complexes in a copper-tolerant green alga

BA Silverberg, PM Stokes and LB Ferstenberg

The results of ultrastructural studies and transmission electron microscope microanalysis of two Scenedesmus strains experimentally exposed to copper sulfate are presented. A fine-structural examination of the cells revealed the presence of nuclear inclusions in the form of central dense-core complexes. Cytoplasmic structures resembling the intranuclear inclusions were occasionally found in the cells. TEM-X-ray microanalysis of these structures has provided evidence that the inclusions contain copper. It is concluded that their presence may be regarded as a detoxifying mechanism.
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