IPTG (Isopropyl b-D-thiogalactopyranoside)
IPTG is an analog of galactose that is nonmetabolizable and inactivates the lac repressor to induce synthesis of β-galactosidase in E. coli. The expression of cloned genes under the control of the lac operon is induced by IPTG. IPTG is commonly used in cloning procedures that require induction of β-galactosidase and is most often used with X-Gal for blue/white bacterial colony screening.
Store frozen at -20°C
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