Fig. 6. Dynein is required for the efficient transport of grk RNA particles towards ring canals. (A,B) Trails of grk RNA injected into wild-type (A; wt) and dhc mutant (B) nurse cells. Schematics on the left represent the site of injection (red outline) and show the average speed±standard error of the mean, the number of egg chambers injected and the total number of particles tracked for analysis. Trails at 1 second intervals were superimposed (0.5 minute duration). Red arrows indicate the direction of RNA-particle movement; broken lines show those particles that seem to follow nurse cell cytoplasmic streaming, and were thus not tracked for analysis. A decrease in the speed of grk RNA particles in dhc mutants is observed by the differences in distance travelled (^*) (also see Movie 6 in the supplementary material). Anterior is to the left and dorsal is to the top. Scale bar: 5 µm in B for A,B.