StramenopilesEukaryotaRNA, Ribosomal, 18SHaptophytaDiatomsPhaeophytaDNA, AlgalPhylogenyProtozoan InfectionsSeawaterPlanktonPlastidsEukaryotic CellsProtozoan ProteinsEvolution, MolecularSequence Analysis, DNAMolecular Sequence DataDNA, RibosomalDNA, ProtozoanCiliophoraGenes, ProtozoanRNA, ProtozoanGenome, ProtozoanProtozoan Infections, AnimalEntamoeba histolyticaGiardia lambliaTrypanosoma cruzi