Phylogeny of antitoxin Phd and addiction module killer Doc protein sequences. Thirty phd toxin sequences (A) and twenty-six anti-toxin sequences (B) from loci of bacterial chromosomes, plasmids and phages were aligned. The sequences were aligned with clustalW and the genetic relationships inferred using the unweighted pair group method with arithmetic mean (UPGMA) implanted in MEGA 4.0 software.
Ma et al. BMC Genomics 2013 14:377 doi:10.1186/1471-2164-14-377