Abstract
An examination of polyribosome profiles has revealed a distinction between the messenger RNA populations present during the delta, gamma-beta, and alpha 1 stages of the follicular epithelium. The delta and gamma-beta stages are both characterized by polysome profiles with no clearly prominent peaks. There is an increase both in the overall activity of the polysome region and in the amount of heavier polysomes in relation to the lighter ones during the transition from the delta to the gamma-beta condition. The alpha 1 oöcytes possess polysome profiles which are characterized by several extremely prominent peaks and by a reduction in the amount of single ribosomes in the cell. This is taken to indicate that the alpha 1 cells are engaged in the synthesis of large quantities of several different proteins, possibly the chorion precursors.
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