試題詳解

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