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Complete alignment of L. pneumophila IraB with E. coli YdgR (GenBank accession no. 1742700) (2) and the Lactococcus lactis di- and tripeptide transporter, DtpT (GenBank accession no. 625863) (33). An asterisk indicates invariant residues, a colon indicates regions of high similarity, and a dot indicates regions of low similarity. Alignments were performed using Align Plus for Windows (Scientific and Educational Software, State Line, Pa.).
