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The xylanase gene of Bacillus circulans Teri-42 was cloned in both B. subtilis and Escherichia coli. The enzyme activity was almost 87% higher in B. subtilis (pBA7) than in E. coli (pAQ4). No cellulase activity was detected in the clones, B. subtilis (pBA7) and E. coli (pAQ4). Approximately 1120 U (80%) of the xylanase was secreted extracellularly by the clone B. subtilis (pBA7) as compared to 79...
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