Cryptococcus genome sequence phylogenetic tree. A phylogeny of the five Cryptococcus strains used in this study. Phylogeny generated from neighbor-joining analysis of a concatenation of all five-way orthologs. Serotype identifiers are indicated in parentheses next to the corresponding strain names. Branch lengths indicate synonymous divergence (dS; not shown for values <0.01). JEC21 is the reference strain.