Table 3

Effect of the expression in trans of crh and the crh1 allele in the ptsH1 crh::aphA3 double mutant on CCR of β-xylosidase

Strain and relevant genotypeβ-Xylosidase activity in units/mg of protein*
Sugar added to CSK
NoneXyloseXylose + fructoseXylose + glucoseXylose + glycerol
QB7108 (ptsH1 crh+)602,250720402,350
QB7112 (ptsH1 crh1)704,8103,8402,56010,860
  • * Enzyme activities were calculated from three independent experiments. Standard deviations did not exceed ±20%.