Phylogenetic trees of the identified putative HKs and RRs in the eight newly sequenced mutans streptococci strains and the two reference strains S. mutans UA159 and NN2025. The trees were constructed using ClustalX by applying the neighbor-joining method. The scale bar is shown above the trees and the scale is in units of "substitution/site".
Song et al. BMC Genomics 2012 13:128 doi:10.1186/1471-2164-13-128