Plant Physiol.
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Plant Physiology 43:1264-1270 (1968)
© 1968 American Society of Plant Biologists

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Properties of Ribulose-1,5-Diphosphate Carboxylase (Carboxydismutase) From Chinese Cabbage and Photosynthetic Microorganisms

Fred J. Kieras and Robert Haselkorn1

Department of Biophysics, University of Chicago, Chicago, Illinois 60637

Ribulose-1,5-diphosphate carboxylase (carboxydismutase) was prepared from Chinese Cabbage [Brassica petsai (Parl)] and the Km values and molecular weight were determined. These parameters were found to be in good agreement with values reported for this enzyme from other higher plants. Investigation of carboxydismutase activity from the photosynthetic micro-organisms Chlamydomonas reinhardi (IU 89+), Plectonema boryanum (IU 594), and Chromatium strain D showed striking similarity to the higher plant enzyme, when the sedimentation coefficients were compared.

1 This investigation was supported by USPHS grants No. AI 04448 and AI 06729 to R. Haselkorn and USPHS Predoctoral Traineeship to F. J. Kieras. R. Haselkorn is the recipient of a Research Career Development Award from USPHS. This material is taken from a thesis presented by F. J. Kieras to the Division of Biological Sciences, Department of Biochemistry at the University of Chicago in partial fulfillment of the requirements for the Ph.D. degree.






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