A region of the cilium between the basal body and proximal segment that is characterized by Y-shaped assemblages that connect axonemal microtubules to the ciliary membrane. The ciliary transition zone appears to function as a gate that controls ciliary membrane composition. (Gene Ontology, GO_0035869)
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21 proteins localized to the ciliary transition zone cellular component from the COMPARTMENTS Curated Protein Localization Evidence Scores dataset.