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Cytodifferentiation: Protein Synthesis in Transition

Ronald C. Fraser
The American Naturalist
Vol. 93, No. 868 (Jan. - Feb., 1959), pp. 47-80
Stable URL: http://www.jstor.org/stable/2458833
Page Count: 34
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Cytodifferentiation: Protein Synthesis in Transition
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Abstract

A theory has been extended which accounts for cytodifferentiation as the consequence of an evolution of structural and functional protein species. The formation of proteins has been treated with consideration given to the roles of nuclear and cytoplasmic components. Possible mechanisms for the alteration in quality and quantity of proteins has been sought, in an attempt to account for the known facts about histogenesis. The theory postulates that, within the limits imposed by the nucleus on the cytoplasm in the form of possible ribonucleoprotein template configurations, the quality and concentrations of diverse cytoplasmic substances, acting as inducers or repressors, guide the cell along its path to differentiation. Cell maturation is reached when there is some semblance of stability in the interaction between reactants and the protein-synthesizing mechanism at various levels, including the nucleus.

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