Plant Physiol.
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Plant Physiology 43:2041-2044 (1968)
© 1968 American Society of Plant Biologists

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Articles

ATP Sulfurylase Activity in the Soybean [Glycine max (L.) Merr.] 1

C. A. Adams and R. E. Johnson2

United States Regional Soybean Laboratory, University of Illinois, Urbana, Illinois 61801

ATP sulfurylase activity was assayed in soybean leaf extracts. A simple, rapid assay system using molybdate as an analogue of sulfate was developed. The assay was coupled to inorganic pyrophosphatase. The high pyrophosphatase level in soybean leaf extracts obviated the necessity of adding this enzyme to the assay system. ATP sulfurylase has a pH maximum above 7.5, uses molybdate and ATP as substrates, and requires magnesium ions for activity.

2 Present address: Department of Agriculture, Western Kentucky University, Bowling Green, Kentucky.

1 Cooperative investigations of the Crops Research Division, Agricultural Research Service, United States Department of Agriculture, and Illinois Agricultural Experiment Station, Urbana, Illinois. Publication No. 513 of the United States Regional Soybean Laboratory, Urbana, Illinois.




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B. C. GERWICK, S. B. KU, and C. C. BLACK
Initiation of Sulfate Activation: A Variation in C4 Photosynthesis Plants
Science, July 25, 1980; 209(4455): 513 - 515.
[Abstract] [PDF]


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Copyright © 1968 by the American Society of Plant Biologists