Fig. 1From: Recombination in pe/ppe genes contributes to genetic variation in Mycobacterium tuberculosis lineagesNucleotide diversity (π) across the genome by lineage; genes with high diversity (π > 0.003) are highlighted. The pe_pgrs3 gene appears to have high nucleotide diversity in all lineages. Some lineage-specific hotspots are seen in lineage 1 (ppe59 and Rv3901c), lineage 3 (Rv2081c) and lineage 4 (ppe57 and ppe60)Back to article page