Fig. 1

Phylogenetic tree of Prochlorococcus and Synechococcus included in ProSynTax. The phylogeny includes 1,106 Prochlorococcus genomes and 154 Synechococcus genomes and is based on a concatenated protein alignment of the 424 single-copy core genes (see Materials and Methods). The tree is arbitrarily rooted at the Synechococcus cluster. The outer layer (colors) depicts the major cluster, clade, or grade defined in ProSynTax for each genome. The middle layer (shades of gray) contains the associated genus for each genome, and the inner layer (black bars) highlights closed genomes that are presented for the first time in this work.