Cluster tree of blaZ gene allotypes found in the MRSA and MSSA collections. The tree was constructed with the neighbor-joining (NJ) method. In each branch is shown the corresponding bootstrap NJ values, taken over 1000 replicates, which assigns confidence values for the groupings in the tree. For each allele, it is indicated the collection(s) (MRSA or MSSA) and genetic lineage (clonal cluster) where it was found.
Milheiriço et al. BMC Microbiology 2011 11:76 doi:10.1186/1471-2180-11-76