Single locus trees fail to resolve species clusters. Individual minimum evolution trees constructed in Mega 2.1 for a) abcZ, b) adk, c) aroE, d) fumC, e) gdh, f) pdhC and g) pgm. The assigned species names of the strains in which these alleles occur are shown.
Hanage et al. BMC Biology 2005 3:6 doi:10.1186/1741-7007-3-6