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. 2014 Oct 22;9(10):e111311. doi: 10.1371/journal.pone.0111311

Figure 3. Global utilization pattern of dipeptides by PA14, the dipeptide transporter DppBCDF and the SBPs DppA1–A5.

Figure 3

The rings show the total number of dipeptides utilized by the wild-type strain PA14 (outer purple ring), transported by the dipeptide transporter system DppBCDF (middle blue ring), and recognized by the substrate-binding proteins (inner dark green ring). The oval rings (green) present different pools of dipeptides (nonpolar, acidic, uncharged) containing a specific amino acid side-chain either at the N- or C-terminal end of the dipeptide (see Table 2). Dipeptides containing positively charged amino acid residues were excluded from the analysis (see Materials and Methods).