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  • Title: Purification and characterization of xylanase from a thermophilic Streptomyces sp. K37.
    Author: Mansour FA, Shereif AA, Nour el-Dein MM, Abou-Dobara MI, Ball AS.
    Journal: Acta Microbiol Pol; 2003; 52(2):159-72. PubMed ID: 14594403.
    Abstract:
    Extracellular xylanase (EC 3.2.1.8) from Streptomyces sp. K37 was purified 33.53 by ultrafiltration and cation exchange chromatography followed by gel filtration chromatography. The optimum pH and temperature for purified xylanase were found to be pH 6.0 and 60 degrees C. The Km and V(max) values of the purified xylanase were 15.4 mg ml(-1) and 0.67 micromole reducing sugar min(-1) ml(-1). High performance liquid chromatography (HPLC) gel filtration of the purified xylanase eluted xylanase activity as a peak corresponding to the molecular weight of about 24.3 kDa while the molecular weight determined by SDS-PAGE was found to be 26.4 kDa. The purified xylanase of Streptomyces sp. K37 was found to be endoxylanase and non arabinose liberating enzyme and was highly glycosylated (73.97%).
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