Fig. 3From: Genomic epidemiology of Lineage 4 Mycobacterium tuberculosis subpopulations in New York City and New Jersey, 1999–2009Unfolded site frequency spectra for isolates from the S75 outbreak cluster (L4:S75) and non-S75 isolates from the New York City area. Dark and light blue bars indicate the number of non-synonymous and synonymous SNPs at each SNP allele frequency (from singletons on the left to SNPs at fixation on the right)Back to article page