IPTG, is an analogue of allolactose that binds specifically to the repressor protein of the lac operon Isopropyl-b-D-thiogalactopyranoside is Beta-galactosidase inducer.
Isopropyl beta-D-thiogalactopyranoside is an S-glycosyl compound consisting of beta-D-1-thiogalactose having an isopropyl group attached to the anomeric sulfur.it is a molecular biology reagent.