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Mycobacterial beta-lactamases are involved in exerting beta-lactam resistance, though many of these proteins remain uncharacterized. Here, we have characterized MSMEG_4455 of Mycobacterium smegmatis as a beta-lactamase using molecular, biochemical and mutational techniques. To elucidate its nature in vivo and in vitro, and to predict its structure–function relationship in silico analysis is done....
Most expression systems used for the over production of many enzymes employ carbon catabolite repressible promoters and hence must use sugar free, rich complex media. Use of expression systems to overcome carbon repression opens an avenue for exploiting cheap carbon sources for the production of recombinant enzymes. A self-inducible, catabolite repression free and above all a glucose-activated expression...
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