Standard numbering scheme for class B beta-lactamases.

MORENO GALLENI,* JOSETTE LAMOTTE-BRASSEUR, GIAN MARIA ROSSOLINI, JIM SPENCER, OTTO DIDEBERG, JEAN-MARIE FRÈRE, AND THE METALLO-b-LACTAMASE WORKING GROUP† Centre d’Ingénierie des Protéines, Université de Liège, B-4000 Liège, Belgium; Dipartimento di Biologia Molecolare, Sezione di Microbiologia, Università di Siena, I-53100 Siena, Italy; Division of Protein Structure, NIMR, London NW7 1AA, United Kingdom; and Laboratoire de Cristallographie Macromoleculaire, Institut de Biologie Structurale Jean-Pierre Ebel (CNRS-CEA), F-38027 Grenoble, France

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