FIG. 6.

Propionaldehyde and butyraldehyde are not toxic to yeast cells. Wild-type cells were grown in minimal media to exponential phase (A₆₀₀ = 0.6) and treated with a range of concentrations of acrolein or propionaldehyde (A) or crotonaldehyde and butyraldehyde (B). Sensitivity was determined by measuring A₆₀₀ readings following 24 h of growth. The values shown are the means for three independent readings.