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1: Extracting protein alignment models from the sequence database. Neuwald AF, Liu JS, Lipman DJ, Lawrence CE; Nucleic Acids Res 1997;25:1665-1677. PMID:9108146

2: The 3-D structure of a zinc metallo-beta-lactamase from Bacillus cereus reveals a new type of protein fold. Carfi A, Pares S, Duee E, Galleni M, Duez C, Frere JM, Dideberg O; EMBO J 1995;14:4914-4921. PMID:7588620