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CLUSTAL W (1.74) multiple-sequence alignment of the amino acid sequences of the DugA protein of B. melitensis (Bru) and the YchF proteins of E. coli (E.coli) and Haemophilus influenzae (Hinfl). Identical amino acids are indicated by asterisks. The GTPase signature motifs G1 to G4 conserved in YchF of E. coli are enclosed in boxes (16).
