Growth assay of the cdt-1-expressing control strain, the WT HXT2.4 transformant, and the mutant HXT2.4(A291D) transformant on cellobiose (A), cellotriose (B), or cellotetraose (C) medium. Symbols: D452-CDT1-BGL (○), D452-HXT2.4-BGL (), and D452-HXT2.4(A291D)-BGL (▲).