Fig. 1. Microtubule cytoskeleton is required for spindle alignment. (A) Scheme of a S. pombe cell with a misaligned spindle. The angle is that formed between the mitotic spindle axis and the long axis of the cell (both axes are indicated with arrows). (B) Percentage of wild-type haploid and diploid control cells, MBC (25 µg/ml) or Latrunculin A (50 µM) treated cells, and mto1
and tip1
cells, showing the angle of the mitotic spindle relative to the long axis of the cell. The range of mitotic spindle angles of mto1
cells MBC-treated cells and tip1
cells were significantly different to wild-type cells (P<0.001) but no significant difference from the wild type was seen in Latrunculin-A-treated cells (P<0.1) or diploid cells (P<0.2).