970 K
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TitleThe Path of Carbon in Photosynthesis XIII. pH Effects in C{sup 14}O{sub 2} Fixation by Scenedesmus
Author(s)Ouellet, C.; Benson, A. A.
Publication DateOctober 23, 1951
Report NumberUCRL-1510
Unique IdentifierACC0316
Other NumbersOSTI ID: 4412374
Research OrgUniversity of California Radiation Laboratory, Berkeley, CA
Contract NoW-7405-eng-48
Sponsoring OrgU.S. Atomic Energy Commission
SubjectBiology And Medicine; Acidity; Alanine; Algae; Alkaloids; Amino Acids; Aspartic Acid; Carbon; Carbon Dioxide; Enzymes; Malic Acid; Metabolism; Organic Acids; Phosphates; Photosynthesis; Scenedesmus; Serine; Sugars
Related Web PagesMelvin Calvin and Carbon in Photosynthesis
AbstractThe rates of photosynthesis and dark fixation of C{sup 14}O{sub 2} in Scenedesmus have been compared in dilute phosphate buffers of 1.6 to 11.4 pH; determination of C{sup 14} incorporation into the various products shows enhancement of uptake in an acid medium into sucrose, polysaccharides, alanine and serine, in an alkaline medium into malic asparctic acids. kinetic experiments at extreme pH values suggest that several paths are available for CO{sub 2} assimilation. A tentative correlation of the results with the pH optima of some enzymes and resultant effects upon concentrations of intermediates is presented.
970 K
20 pp.
 
View Document 
  


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