The human parasite, Toxoplasma gondii, is paralyzed without two components of the apical polar ring
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The phylum Apicomplexa contains ~ 6000 known species of unicellular eukaryotic parasites. A unifying feature among the apicomplexans is the apical complex, which varies in complexity in different lineages, but always contains an annulus (a.k.a. the apical pola... ...
