Studies on cytosolic superoxide dismutase from intestinal mucosa

Manohar, M. ; Balasubramanian, K. A. (1991) Studies on cytosolic superoxide dismutase from intestinal mucosa Indian Journal of Biochemistry & Biophysics, 28 (1). pp. 52-57. ISSN 0301-1208

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CuZn superoxide dismutase from monkey (Macaca radiata) intestinal mucosa was purified to homogenity. The enzyme showed a subunit molecular weight of 16000. The enzyme preparation from intestinal mucosa of rat, rabbit, guinea-pig and monkey was distinctly different in electrophoretic mobility and in elution profile on ion-exchange chromatography, possibly due to their difference in charge. The difference may not be due to glycosylation, since the enzyme was not stained for glycoprotein. Polyclonal antibody against purified monkey enzyme inhibited the activity of intestinal CuZn superoxide dismutase from rat, rabbit and guinea-pig. Thus it appears that intestinal CuZn superoxide dismutases from different sources, despite being similar in immunological and other properties, differ in certain amino acids and hence in charge.

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