Figure 4.

Actin snarls in growing bristle tips are dynamic. A timed series of confocal images through a posterior scutellar macrochaete from a 31-h wild-type pupa labeled with GFP-actin. Each image represents a longitudinal section of a fraction of the bristle cylinder (∼2.5 μm) and shows actin bundles plus many actin snarls. All snarls seem to be dynamic because individual snarls are present for only 2–4 min, during this sequence. Several examples are indicated by arrows in the frames where they are present. Bar, 2 μm.