Table 2.

Effect of pH on the growth of an S. cerevisiae mep1mep2mep3 triple-mutant strain at different ammonium concentrations

Strain	[NH4+],* mM	pH 6.1			pH 7.1
		20	5	1	20	5	1
23344c (6)		144	144	146	140	142	140
(wild type)
31019b (6)		166	283	NG†	158	167	288
(mep1Δmep2Δmep3Δ)

Data are doubling time (min). Cells were grown in medium 164 with glucose (3%) as carbon source and ammonium as sole nitrogen source. 

^*[NH₄⁺ + NH₃]. 

^†No growth.