Milk-clotting protease production by <Emphasis Type="Italic">Nocardiopsis</Emphasis> sp. in an inexpensive medium |
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Authors: | M?T?H?Cavalcanti C?R?Martinez V?C?Furtado B?B?Neto M?F?Teixeira J?L?Lima Filho Email author" target="_blank">A?L?F?PortoEmail author |
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Institution: | (1) Laboratório de Imunopatologia Keizo Asami, LIKA/UFPE, Brazil;(2) Departamento de Bioquímica, UFPE, Brazil;(3) Departamento de Química Fundamental, UFPE, Brazil;(4) Departamento de Patologia, UA, Brazil;(5) Departamento de Morfologia e Fisiologia Animal, UFRPE, Brazil |
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Abstract: | The milk-clotting and proteolytic activities of extracellular enzyme preparations from Nocardiopsis sp. were investigated under different culture conditions. A soybean flour medium was used, with concentrations of soybean flour and of glucose varying from 0.25 to 1% w/v and from 0 to 1% w/v, respectively. Growth was monitored with 2ml samples withdrawn from the culture medium at 8-h intervals, for determination of total protein, proteolytic activity, milk-clotting activity and sugar reduction. The best milk-clotting protease production, with a specific activity of 24.49U/mg at 40h, was obtained in the glucose-free medium containing soybean flour 1% w/v. |
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Keywords: | Milk-clotting protease Nocardiopsis sp production of milk-clotting protease |
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