. The biological role of ribonucleic acids. RNA; Biosynthesis. RNA IN NORMAL AMPHIBIAN EGGS 63. Fig. 22. RNA gradients in Xenupiis late gastrula. Note tiie more intensive baso- philia of the dorsal lip (right) as compared to the ventral one (Brachet, 1957).. 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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