IPTG (isopropyl-β-thiogalactoside) is an analogue of allolactose that binds specifically to the repressor protein of the lac operon and induces expression of β-galactosidase in Escherichia coli. IPTG is a commonly used reagent in cloning procedures that require induction of…

Isopropyl b-D-1-thiogalactopyranoside is a non-metabolizable galactose analog that induces expression of the lac operon in Escherichia coli. It functions by binding to the lac repressor and altering its conformation. This inactivation prevents the repression of the b-galactosidase coding lac gene. …