1024 K
24 pp.
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TitleThe Path of Carbon in Photosynthesis XVI. Kinetic Relationships of the Intermediates in Steady State Photosynthesis
Author(s)Benson, A. A.; Kawaguchi, S.; Hayes, P.; Calvin, M.
Publication DateJune 05, 1952
Report NumberUCRL--1658-Rev.
Unique IdentifierACC0319
Other NumbersOSTI ID: 915057
Research OrgUniversity of California Radiation Laboratory, Berkeley, CA; Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US) [LBL][LBNL]
Contract NoW-7405-eng-48; DE-AC02-05CH11231
Sponsoring OrgU.S. Atomic Energy Commission (AEC)
Subject14 Solar Energy; Carbon Cycle; Carbon Dioxide; Carboxylation; Fructose; Glucose; Chemical Reaction Kinetics; Malic Acid; Phosphates; Photosynthesis; Ribulose; Saccharides; Carbon 14 Compounds; Reaction Intermediates
KeywordsBiology And Medicine; Biochemistry; Carbon 14; Chromatography; Labelled Compounds; Light; Organic Acids; Organic Compounds; Phosphorylation; Photochemistry; Radioactivity; Reaction Kinetics; Ribulose; Sedoheptulose; Sugars
Related Web PagesMelvin Calvin and Carbon in Photosynthesis
AbstractA kinetic study of the accumulation of C{sup 14} in the intermediates of steady state photosynthesis in C{sup 14}O{sub 2} provides information regarding the sequence of reactions involved. The work described applied the radio-chromatographic technique for analysis of the labeled early products. The simultaneous carboxylation reaction resulting in malic acid as well as phosphoglycerate is demonstrated in experiments at high light intensity. A comparison of radioactivities in a number of phosphorylated sugars as a function of time reveals concurrent synthesis of fructose and sedoheptulose phosphates followed by that of ribulose phosphates and later by that of glucose phosphates. The possibility that the cleavage of C{sub 4} compounds to C{sub 2} carbon dioxide acceptors may involve C{sub 7} and C{sub 5} sugars and evidence for this mechanism is presented.
1024 K
24 pp.
View Document 

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