Fig. 2.

Maximum likelihood (ML) phylogenomic analysis of the cyanobacterial radiation based on a concatenated amino acid sequences for 31 conserved loci [35, 42] showing the phylogenomic affiliation of ESFC-1 with two species of Spirulina (PCC 6313 and PCC 9445; clade in red). Only the portion of the larger tree corresponding to lineage B2 (sensu [42]) is shown. The full 126-taxon ML tree was built using PHYML using the LG protein substitution matrix, and was rooted with Chloroflexus auranticus J-10, Rhodobacter sphaeroides 2.4.1, Heliobacterium modesticaldum Ice1, and Chlorobium tepidum TLS [43–45]. ML bootstrap values for nodes >50 are shown; black boxes at the nodes denote bootstrap values of 100. Strain ESFC-1 and the nearest neighbors are highlighted in red