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The Journal of Cell Biology, Vol 26, 125-135, Copyright © 1965 by Rockefeller University Press

ARTICLE

STRANDEDNESS OF VICIA FABA CHROMOSOMES AS REVEALED BY ENZYME DIGESTION STUDIES

James E. Trosko Ph.D.1 and Sheldon Wolff Ph.D.1

1 From the Biology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee

Chromosomes and nuclei isolated from neutral formalin-fixed Vicia faba lateral roots were treated with trypsin, pepsin, RNase, or DNase. Only trypsin affected the morphology of the chromosomes and nuclei. The appearance of the chromosomes after trypsin digestion indicated that each chromatid contained four strands that could be seen with an ordinary light microscope. The experiments are interpreted as indicating that mitotic chromosomes of Vicia faba are multistranded and that the linear continuity of the chromosome is dependent on protein.

Submitted on October 13, 1964


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