The gene encoding a beta-lactamase of Prevotella intermedia was cloned and sequenced. This gene, called cfxA2, shared 98% identity with cfxA, the structural gene of a beta-lactamase previously described in Bacteroides vulgatus. The deduced protein sequence had a K272E substitution. CfxA2 had the characteristics of class A, group 2e beta-lactamases.
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Madinier et al. (2001) studied this question.
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