Figure 1.

Phylogenetic analyses of chlamydiae-like genes in primary photosynthetic eukaryotes. Numbers above the branch show bootstrap values for maximum likelihood and distance analyses, respectively. Asterisks indicate values lower than 50%. (a) 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase (ispD). (b) 4-diphosphocytidyl-2-C-methyl-D-erythritol kinase (ispE). (c) β-Ketoacyl-ACP synthase (fabF). (d) Aspartate transaminase. Note that red algal and green plant sequences form a well supported monophyletic group with environmental Protochlamydia homologs. mt, mitochondrial precursor. Colors represent different phylogenetic affiliations.