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  • Title: Purification and characterization of heterogeneous glucoamylases from Monascus purpureus.
    Author: Tachibana S, Yasuda M.
    Journal: Biosci Biotechnol Biochem; 2007 Oct; 71(10):2573-6. PubMed ID: 17928688.
    Abstract:
    Two forms of an extracellular glucoamylase, MpuGA-I and MpuGA-II, were purified to homogeneity from Monascus purpureus RY3410. The molecular weights of these enzymes were estimated to be 60,000 (MpuGA-I) and 89,000 (MpuGA-II). These enzymes were glycoproteins with a carbohydrate content of 15.0% (MpuGA-I) and 16.2% (MpuGA-II) respectively. The pH optima were 5.0 for both enzymes, and the optimal temperatures were 50 degrees C (MpuGA-I) and 65 degrees C (MpuGA-II). The Km values for soluble starch were calculated to be 4.0+/-0.8 mg/ml (MpuGA-I) and 1.1+/-0.2 mg/ml (MpuGA-II) respectively.
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