The percentage of Tyr (Figure 8A) and aromatic hydrophobic amino acids (Figure 8B) at the +5 position. For Figure 8A, we calculated the percentage of Tyr at the +5 position from all unique peptides from 437 organisms and for Figure 8B, we calculated the frequency of Tyr, Phe and Trp at the +5 position from all unique peptides from 437 organisms. In both plots Helicobacter strains shows a high preference of Tyr and aromatic amino acids at the +5 position.
Paramasivam et al. BMC Genomics 2012 13:510 doi:10.1186/1471-2164-13-510