IC organization in 95F myosin mutants. In jarmmw14/Df(3R)S87-5 (labeled mmw14; A and B) and jar1/jar1 (C–E) testes, the ICs are not aligned in register with one another, as seen in wild type. Testes were stained for either DNA (B and D) or actin (A, C, and E). The nuclei within a single cyst are positioned aberrantly, although actin is localized to each nucleus. 95F myosin is absent from the IC (our unpublished data). (E) Disrupted jar1/jar1 IC that has progressed away from the nuclei. The nuclei and actin cones are strung out along the cyst, and the actin staining is diminished. Bar, 0.75 μm.