Figure 1From: Genetic diversity of Mycobacterium tuberculosis isolates from Beijing, China assessed by Spoligotyping, LSPs and VNTR profiles Cluster map based on 22 VNTR loci in 260 M. tuberculosis strains, clustered using the UPGMA (unweighted pair group cluster method with arithmetic mean) method in BioNumerics 5.0. The large box shows ancient Beijing strains, while the small box shows the 9 strains in which RD181 is intact.Back to article page