Fig. 3. Dynactin is required postmitotically to maintain photoreceptor nuclear positioning. Third instar eye–brain complexes are stained with anti-Chaoptin (red) and anti-Elav (green). No photoreceptor nuclei (arrowheads) are seen in the optic stalk in wild type (A). Expression of dominant-negative Glued or overexpression of Dynamitin in differentiated photoreceptors under the control of Glass_38-1 causes nuclei to leave the eye disc and enter the optic stalk (B,C, arrowheads).