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Phylogeny of chromosomally encoded MBLs. Represented sequences of various MBLs were obtained from GenBank. IMP-1 and IMP-12 (most divergent from IMP-1) and VIM-1 and VIM-7 (most divergent from VIM-1) were also added for comparison. Signal peptides were removed prior to alignment. Sequences were aligned and phylogeny trees were constructed with Clustal W (PAM250 matrix; DNA Star) using the neighbor joining method.
