FIG. 1.

Maltose uptake by A. acidocaldarius cells. Cells were grown in minimal medium supplemented with maltose (10 mM) (○), glucose (10 mM) (□), or maltose and glucose (10 mM each) (●) as a carbon source. Uptake assays were performed at 57°C, pH 3.6, and 3 μM [¹⁴C]maltose.