Abstract

The culture time for maximal enzyme production by bacteria was determined by SDS-fibrin zymography. Bacillus subtilis and B. amyloliquefaciens secreted several extracellular proteases during the cellular lysis after 40 h and 30 h, respectively. Using this technique, we determined which protein possessed activity and would be isolated before the process of purification began. This proposed method offers an effective harvesting time in which to obtain the proteins having maximal activity.

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