Figure 2.

Midbodies formed in association with ectopic cleavage furrows are structurally similar to control midbodies. (A) Phase-contrast image of a cell containing two control midbodies (arrows) and one ectopic midbody (arrowhead) just before fixation for serial-section EM. (B–D) Selected electron micrographs through the midbodies pictured in A. The letter by the arrow or arrowhead in A indicates the respective micrograph depicting its ultrastructure. The midbody formed in association with the ectopic furrow (D, also arrowhead in A) is structurally similar to those of the controls (B and C). All contain bundles of microtubules that are embedded in an electron-opaque matrix. Bars: A, 10 μm; B–D, 0.75 μm.