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J. Biophys. and Biochem. Cytol., Vol 3, 859-866, Copyright © 1957 by Rockefeller University Press

ARTICLE

ELECTRON MICROSCOPIC OBSERVATIONS OF AMOEBA PROTEUS IN GROWTH AND INANITION

Adolph I. Cohen Ph.D.1

1 From the Department of Anatomy, Washington University School of Medicine, St. Louis

Electron microscopic observations have been made on growing and dividing specimens of Amoeba proteus and also on starving animals. Structures presumably corresponding to the mitochondria, alpha particles, vacuoles, and Golgi material are described. A new entity, designated as a foamy particle, is noted.

Descriptions are given of the cytoplasmic and nuclear membranes. During division the inner, thick nuclear membrane component is seen to vanish and the outer membrane persist. Measurements suggest a gradual reappearance of the inner component with growth.

Starving animals show a loss of cytoplasmic granularity and an increase in the electron density of mitochondria, presumably due to lipide accumulation.

 Submitted on May 6, 1957


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