Expression profiles of sequenced bacterial peptides.

<p>Contourplots of the sequenced polypeptides originating from <i>E. coli</i> and <i>E. faecalis</i> in the 5 lots of Pro-Symbioflor and culture medium. To improve visualization of the peptides in this contourplot, the abundance of the peptides was artificially amplified with a factor 3 in relation to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0066682#pone-0066682-g001" target="_blank">Figure 1</a>. The 9 signals shown in culture medium are false positive hits by sequencing via LC-MS/MS. Given that 390 bacterial peptides were identified we obtained an acceptable false discovery rate of below 5%.