Figure 2.

Sulfate assimilation of trx1, trx2 cells expressing transgenic thioredoxins. Cells were first grown in YMGE medium to a density of about 10⁷ cells per ml. Cultures were then diluted to OD₆₀₀ = 0.2 and 15 μl of each one was plated on YMGal agar medium free of methionine. Plates were incubated 6 days at 30°C.