Abstract
Both porphobilinogen oxygenase and skatole pyrrolooxygenase of wheat germ have isoenzyme forms of different charge. The more cationic isoenzymes were eluted from DEAE-cellulose with 10 mM Tris-HCl buffer (pH 7.6) and the less cationic were eluted with 50 mM NACl in the same buffer. The former had almost twice as many free amino groups (per mg of protein) as the latter. The more cationic isoenzyme was more sensitive to chelating agents and to acid treatment. They were differently inhibited by sodium dodecyl treatment and by temperature inactivation. Porphobilinogen oxygenase isoenzymes showed different activities with different buffers and also differed in their kinetics.
Published Version
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