Abnormal spindles in moe1Δ
mal3Δ cells. Cells pregrown at 30°C to log phase
were transferred to 20°C and examined after 24 h. (A) The
spindles were examined by immunostaining (MT, a–g), and Cut11-GFP was
visualized directly (h). An arrowhead indicates the position of a
septum. (B) The relative abundance of various forms of spindles,
observed in A, among all the cells that contain a spindle are
tabulated. (C) An example of a moe1Δ
mal3Δ cell in anaphase (spindle length of 7 μm)
containing unseparated chromosomes. The strains used were SP870
(wild-type, WT), ME1UML3A (moe1Δ
mal3Δ), MOE1U (moe1Δ), MAL3A
(mal3Δ), and ECP16 (moe1Δ
mal3Δ cut11::gfp).