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Figure 9. Phylogenetic trees (A) of the MT4 domains of PPR-MT4 along with representative TrmB and trm8 proteins; (B) of the PPR domains in PPR-MT4 proteins. Note that in both trees PPR19 tends to group with the PPR-MT4 of secondary endosymbionts, and PPR26 with the PPR-MT4 of Amoebas.
