cut11ts alleles are
synthetically lethal with the SPB mutant
cut12–1ts. One example of limited growth is
observed between cut11–5 and cut12–1,
as shown. Top Left, the position of the parental strains,
double mutant, and wild type on each of the plates. Top Right and
Bottom, plates with strains grown on rich medium at 20, 25, and 36°C.
The results with other allelic combinations are described in the
text.