A cytoskeleton-like structure, originating from the basal body at the proximal end of a cilium, and extending proximally toward the cell nucleus. Rootlets are typically 80-100 nm in diameter and contain cross striae distributed at regular intervals of approximately 55-70 nm. (Gene Ontology, GO_0035253)
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8 proteins localized to the ciliary rootlet cellular component from the COMPARTMENTS Curated Protein Localization Evidence Scores dataset.