Research Article

Purification and Characterization of Alkaline-Thermostable Protease Enzyme from Pitaya (Hylocereus polyrhizus) Waste: A Potential Low Cost of the Enzyme

Figure 2

SDS-PAGE of the purified protease. M: standard protein markers; lane 1: crude enzyme; lane 2: ammonium sulphate-precipitated enzyme; lane 3: purified enzyme on SP-Sepharose (cation exchange); lane 4: purified enzyme on Sephacryl S-200 (gel filtration).
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