. The biological role of ribonucleic acids. RNA; Biosynthesis. EXPERIMENTAL RESULTS 123 f I t / c4, Fig. 39. Nucleus and nucleolus of Acetabularia treated with dinitrophenol. Unna staining (Brachet et a/., 1955).. ••§. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brachet, J. (Jean), 1909-. Amsterdam, New York, Elsevier Pub. Co.

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