. Chemical embryology. Embryology. â¡ Ether-soluble P â Inorganic P O Viteflin P ® Nucleo-probein P ® Vitellin and nucleo-protein P (not separated) Days â. Days-* 5 Fig. 375- Fig. 376. the latter were included with the remainder of the egg. This is a demonstration that their content of nuclein is not insignificant. In the embryonic body the percentage of nuclein phosphorus seems to have a peak on the 17th day, but this is probably not real, as the curves are percentage curves and not curves of absolute magni- tude. Doubtless the number of milligrams of nuclein phosphorus increase without a b
. Chemical embryology. Embryology. â¡ Ether-soluble P â Inorganic P O Viteflin P ® Nucleo-probein P ® Vitellin and nucleo-protein P (not separated) Days â. Days-* 5 Fig. 375- Fig. 376. the latter were included with the remainder of the egg. This is a demonstration that their content of nuclein is not insignificant. In the embryonic body the percentage of nuclein phosphorus seems to have a peak on the 17th day, but this is probably not real, as the curves are percentage curves and not curves of absolute magni- tude. Doubtless the number of milligrams of nuclein phosphorus increase without a break in the embryo, but after the 17th day the enormous increase of inorganic phosphate in the chick's body causes a diminution in the percentage of nucleoprotein phosphorus. It has been suggested that the manufacture of nuclein proceeds externally to the embryo to some extent, and that the nuclein is absorbed after- wards, and, in view of Sendju's results on the purine content of the. 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 Needham, Joseph, 1900-. New York: The MacMillan Co.
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