In centrioles, what type of fibers connect the triplet microtubules? In a centriole, each "arm" (a triplet microtubule) is attached from its A-tubule to the C-tubule of the adjacent arm. What is the type of fiber that connects each arm ("connecting fibrils" in the image below)? ![enter image description here](

Winey M, O'Toole E. 2014. Centriole structure. Phil Trans R Soc B 369:20130457

> Cross-sectional images of centrioles and basal bodies show a linker between the A- and C-tubules in many different organisms... **Surprisingly, candidate molecules serving as constituents of these linkers have not yet been identified.**

That's as of 2014. I don't have the time right now, but I'll try at some point to find if there are more recent developments.