TABLE 2.

Effect of ethanol on the internalization rate of the maltose transporter in NTH1 wild-type cells and nth1Δ mutant cells^a

Ethanol concn (%)	Inhibition by ethanol (%) of the internalization rate in:
	NTH1 cells	nth1Δ cells
0	0	0
2	55	13
4	70	28
6	90	37

^aStrains YS18 and YSN1 were harvested during growth in YNB medium containing 2% maltose and the required amino acids, suspended in ammonium-free medium in the absence or presence of ethanol at the indicated concentrations, and incubated at 30°C. The rate of internalization, which in these strains started immediately after suspension in ammonium-free medium, was monitored over the first 2 h by measuring maltose transport activity in samples of the suspension taken every 20 min. Data are mean values of two experiments. Differences between the two values were <10%.