Superoxide dismutases (SODs) are ubiquitous antioxidant enzymes involved in cell protection from reactive oxygen species. Their antioxidant activities make them of interest to applied biotechnology industries and are usually sourced from plants. SODs are also involved in stress signaling responses
Proteins from the fresh roots of Stemona tuberosa (Stemonaceae) were extracted into 20 mM phosphate buffer, pH 7.2/0.1 M NaCl, precipitated with 90% saturation ammonium sulfate, and enriched by diethylaminoethanol (DEAE) cellulose. The protein eluted as a single main peak from the unbound fractions
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