Figure 1. Maltose- and isomaltose-specific genes are differentially regulated.

Representative brightfield and fluorescence microscopy images of yeast cells with various MALS or MALT genes fluorescently tagged are shown for wt cells (a) and strains carrying deletions of genes encoding transcriptional regulators (b: MALX3 and c: YFL052W). Cells were grown in presence of either palatinose (α 1–6 disaccharide) or maltose (α 1–4 disaccharide) as indicated above the pictures. Gene names are listed in the first column, and protein activities towards the two types of sugars (maltose or palatinose) are indicated in the second and third columns. Scale bar is included in the upper left image and equals 10 μm. The experiment was repeated at least three times.