The cells from mating type a and α were mixed in a 5 μL droplet of
sterile H2O on YPD agar plates and incubated overnight at room temperature.
To obtain double mutants in this study, single deletions in mating
type a and α were mated.
The combinations for mating of the cells are as
follows: Δaco1Δicl1 (Δaco1, Mat α with Δicl1, Mat a), Δidh1Δidp1
(Δidh1, Mat α with Δidp1, Mat a), Δfrd1Δosm1 (Δfrd1, Mat α with
Δosm1, Mat a) and Δsdh1Δsdh2 (Δsdh1, Mat α with Δsdh2, Mat a).