. Biophysical science. Biophysics. 20 : 4/ Photosynthesis 369 in that it is exothermic, liberating energy and apparently going even in the absence of any specific enzyme. Reduced pyridine nucleotide is used to convert 3-phospho-glyceric acid to 3-phosphoglyceraldehyde. Carboxydismutase System. Epimerase H2CO® Xylulose - 5-P Sucrose and Starch Figure 4. Some of the steps in photosynthesis. (P) stands for phosphate in the diagram and P for phosphate in the names. Note that all compounds with five or more carbons are sugars and probably exist primarily in a ring isomer; straight-chain formulas ar
. Biophysical science. Biophysics. 20 : 4/ Photosynthesis 369 in that it is exothermic, liberating energy and apparently going even in the absence of any specific enzyme. Reduced pyridine nucleotide is used to convert 3-phospho-glyceric acid to 3-phosphoglyceraldehyde. Carboxydismutase System. Epimerase H2CO® Xylulose - 5-P Sucrose and Starch Figure 4. Some of the steps in photosynthesis. (P) stands for phosphate in the diagram and P for phosphate in the names. Note that all compounds with five or more carbons are sugars and probably exist primarily in a ring isomer; straight-chain formulas are for convenience only. After J. A. Bassham and M. Calvin, The Path of Carbon in Photosynthesis (Englewood Cliffs, : Prentice-Hall, Inc., 1957). ATP is used at this step and in the formation of the ribulose-l,5-diphos- phate. Although the scheme shown in Figures 4 and 5 may seem extremely complex, all evidence indicates that it is an oversimplification. None- theless, the general cyclic character and the need for reduced pyridine nucleotide (PNH) and ATP seem established beyond question. 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 Ackerman, Eugene, 1920-. Englewood Cliffs, N. J. , Prentice-Hall
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