radial spoke (GO:0001534)

Protein complex that links the outer microtubule doublet of the ciliary or flagellum axoneme with the sheath that surrounds the central pair of microtubules. Composed of a stalk that attaches to each doublet microtubule and a globular structure (spoke head) that projects toward the central pair of microtubules.

General

axoneme part (GO:0044447) protein complex (GO:0043234)

References

gene ontology: GO:0001534 PMID: 9450971