Intraflagellar transport delivers tubulin isotypes to sensory cilium middle and distal segments

Sensory cilia assembly has been proposed to occur through the kinesin-2-driven delivery of precursors to the axoneme tip by intraflagellar transport (IFT). Microscopy analysis and mathematical modelling provide evidence that tubulin subunits are transported to their sites of incorporation into microtubules at axonemal tips by IFT.