Figure 4From: Is the C-terminal insertional signal in Gram-negative bacterial outer membrane proteins species-specific or not?Percentage of Arg and Lys at +2 positions. We calculated the percentage of Arg and Lys residues at the +2 position from all unique peptides from the 437 organisms; color is based on taxonomic class. The Neisseria strains show a high preference for positively charged amino acids at the +2 position compared to other organisms.Back to article page