A rod-shaped protein complex containing Centrin4 protein that flanks the flagellum attachment zone (FAZ) filament and the quartet microtubules.
Source:
GOC:krc,
PMID:26540076,
GOC:ach,
PMID:31217284
Comment
Note that cilia and eukaryotic flagella are deemed to be equivalent. In diplomonad species, such as Giardia, the axoneme may extend intracellularly up to 5um away from the plane of the plasma membrane.