複選題35. Transcriptional activation of enzymes specified for the utilization of lactose as a carbon source in E. coli requires the small-molecule signals by changing the DNA binding activity of two proteins, one being inactivated and the other activated. They are controlled by binding with (A) c-AMP (B) ATP (C) Lactose or 1,6-Allolactose (D) Isopropyl-thiogalactoside (IPTG) (E) glucose