Figure 10From: Structure and dynamics of the pan-genome of Streptococcus pneumoniae and closely related speciesVariation of the number of dispensable and core genes upon the addition of new species or strains. Strains are added sequentially, starting with the 44 S. pneumoniae strains followed by the S. mitis (region I), S. oralis and S. infantis (region II), S sanguinis and S. pyogenes (region III) strains.Back to article page