Cnn-T and Cnn-C^Δ1-77 scaffolds organize microtubules more robustly than Cnn-C scaffolds. (A-C) Fluorescence images of Cnn-C scaffolds (A), Cnn-T scaffolds (B), or Cnn-C^Δ1-77 scaffolds (C) within eggs expressing the microtubule marker Jupiter-mCherry. (D) Bar graph showing results of a blind categorization of eggs containing the different scaffold types based on the ability of the scaffolds within each egg to organize microtubule asters (numbers of eggs analyzed indicated above). (E and F) Fluorescence images showing that adjacent Cnn-T (E) or Cnn-C^Δ1-77 (F) scaffolds can organize spindle-like structures.