06 May 2016
Vol 352, Issue 6286

About The Cover

Cover image expansion

COVER Intraflagellar transport (IFT) in the cilium of a eukaryotic cell. IFT trains use microtubule doublets as bidirectional railways to transport ciliary building blocks along the axoneme. Assigning directionality to individual microtubules in the doublet ensures that trains moving forward (light purple) and backward (red) do not collide. Thus, traffic jams are avoided during assembly and disassembly of the cilium. See page 721.
Illustration: C. Bickel/Science