TABLE 1.

Yeast strains

Strain	Genotype	Reference
SEY6210	MATα his3-Δ200 leu2-3-112 lys2-801 trp1-Δ901 ura3-52 suc2-Δ9	47
SEY6211	MATahis3-Δ200 leu2-3-112 ade2-101 trp1-Δ901 ura3-52 suc2-Δ9	47
XMA0-2L	SEY6210 except pmt2Δ::LEU2	37
XMA1-2L	SEY6211 except pmt2Δ::LEU2	14
XMA0-4T	SEY6210 except pmt4::TRP1	24
XMA1-4T	SEY6211 except pmt4::TRP1	14
pmt2 pmt4Δ mutant	MATahis3-Δ200 leu2-3-112 lys2-801 trp1-Δ901 ura3-52 suc2-Δ9 pmt2Δ::LEU2 pmt4::TRP1	13