Figure 2.

Primary photosynthetic eukaryotes contain gene copies of both plastidic and chlamydial origin. Numbers above the branch show bootstrap values for maximum likelihood and distance analyses, respectively. Asterisks indicate values lower than 50%. (a) 4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase (gcpE). (b) Enoyl-ACP reductase (fabI). Note that in panel (a) sequences from red algae and glaucophytes are of plastidic origin, whereas those from green plants, apicomplexans, haptophytes, and chlorarachniophytes are of chlamydial origin. Also note that that in panel (b) sequences from green plants, diatoms, chlorarachniophytes, and apicomplexans form a strongly supported group, whereas cyanobacterial and red alga Cyanidioschyzon homologs form another group. Colors represent different phylogenetic affiliations.