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. 2014 Oct;82(10):4276–4291. doi: 10.1128/IAI.02323-14

FIG 1.

FIG 1

Identification of oligopeptide transporter systems in C. difficile. Comparison of the opp (A) and app (B) operons in B. subtilis 168 (GenBank accession no. AL009126) and C. difficile 630 (GenBank accession no. AM180355). OppA/AppA are solute-binding lipoproteins, OppBC/AppBC are transmembrane proteins, and OppDF/AppDF are ATP-binding proteins. *, a pseudogene; OppF is annotated as a pseudogene in C. difficile 630 as well as AppA in B. subtilis 168 (57). Numbers below the arrows represent percent identity to proteins in the corresponding B. subtilis sequences.