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- W2037200323 abstract "The enzymes called BRO-1 (formerly called “Ravasio-type”) and BRO-2 (formerly called “1908-type”) are the most predominantly observed β-lactamases in clinical Moraxella catarrhalis isolates. Both of these enzymes can be observed on a worldwide scale, whereas other enzymes occur infrequently. The first β-lactamase producing (bla+) isolate was detected in clinical specimens in 1976; at present however, 70 to 90 % of all clinical isolates are bla+. These enzymes are most likely transposon-mediated and can be observed in other members of the Moraxella family. The molecular weight ot the BRO-1 enzyme amounts to 33 kdal; it hydrolyses the penicillin derivatives very rapidly, to a lesser extent the older cephalosporins; however, the latter ones exhibit low affinity to the enzyme. Les enzymes dénommés BRO-1 (précédemment dénommés “de type Ravasio”) et BRO-2 (précédemment dénommés “type 1908”) sont les β-lactamases les plus fréquemment observées à partir des isolements cliniques de Moraxella catarrhalis. Ces deux enzymes peuvent être retrouvés dans le monde entier, alors que d'autres enzymes sont moins fréquemment retrouvés. Le premier isolement, producteur de β-lactamases (bla+), a été détecté à partir d'un prélèvement clinique en 1976; actuellement 70 à 90 % de tous les isolements cliniques sont bla+. Ces enzymes sont le plus probablement médiés par un transposant et peuvent être retrouvés chez d'autres membres de la famille des Moraxella. Le poids moléculaire de l'enzyme BRO-1 est de 33 kdal; cet enzyme hydrolyse les dérivés de la pénicilline très rapidement, à un degré moindre les céphalosporines anciennes; cependant, les plus récents démontrent une affinité faible pour l'enzyme." @default.
- W2037200323 created "2016-06-24" @default.
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- W2037200323 date "1992-06-01" @default.
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- W2037200323 title "Beta-lactamases of Moraxella catarrhalis" @default.
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- W2037200323 doi "https://doi.org/10.1016/s0399-077x(05)80865-0" @default.
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