5-fold
serial dilutions in water were prepared and 5 μl of each dilution was spotted on either SC-D
or SC-L plates. Growth was assessed after the plates had been incubated for two or four
days at 30 °C. To determine the growth rate of strains in liquid media, cells were grown in 3
ml of SC-D medium to saturation over night, diluted to A600 value of 0.001 in the same
medium either with (0.5 to 1.5 mM DTT) or without DTT and A600 values of the cultures were
determined ove