Figure 4

Similarity comparison of the core 31 proteins present in all the non-phagic 47-kb SSRs of all strains, and missing in the M-protein-negative group A streptococcus T11. SF370 proteins are compared with proteins of all other genomes present in Table 1. Protein Blast scores for the three genomes were averaged and normalized to the score of M1 versus itself (normalized score of 1). M protein type I (spy2018) showed a major difference in its amino acid composition among strains.