TABLE 1.

Yeast strains used in this study

Strain	Relevant genotype	Source or reference
SK1 diploid	HO/HO	28
FKY74	Homozygous MATa; MATa/MATaho::LYS2/ho::LYS2 lys2/lys2 leu2::hisG/leu2::hisG his4/his4 ura3/ura3	34
W303 (FKY688)	MATa/MATα ura3-1/ura3-1 trp1-Δ2/trp1-Δ2 leu2-3,112/leu2-3,112 his3-11/his3-11 ade2-1/ade2-1 can1-100/can1-100	F. Klein
AMP115	MATa/α ho::LYS2/ho::LYS2 ura3/ura3 leu2::hisG/leu2::hisG trp1::hisG/trp1::hisG lys2/lys2 ime1-12::TRP1/ime1-12::TRP1	2
VG72-DM	MATa/MATα leu2 his3 ura3-MATa-URA3/ura3 TRP1/trp1 MET10/met10 (monosomic for I and III)	21