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We characterized trypsin‐ and chymotrypsin‐like serine alkaline proteases from cotton bollworm, Helicoverpa armigera, for their probable potential application as additives in various bio‐formulations. Purification was achieved by using hydroxylapatite, DEAE sephadex and CM sephadex columns, which resulted in increased enzyme activity by 13.76‐ and 14.05‐fold for trypsin and chymotrypsin, respectively...
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