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Metabolism and Enzymology

Purification and Properties of Arginase from Soybean, Glycine max, Axes

Department of Biochemistry, College of Science, Yonsei University, Seoul 120-749, Korea

Arginase (EC 3.5.3.1) was purified to homogeneity from cytosol of soybean, Glycine max, axes by chromatographic separations on Sephadex G-200, DEAE-sephacel, hydroxyapatite, and arginine-affinity columns. The molecular weight of the enzyme estimated by pore gradient gel electrophoresis was 240,000, while sodium dodecyl sulfate polyacrylamide gel electrophoresis gave a single band at the molecular weight of 60,000. The optimal pH for activity was 9.5 and the K_m value was 83 millimolar. The enzyme was stimulated by polyamines such as putrescine.

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