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Isopropyl β-D-1-thiogalactopyranoside

Isopropyl β-D-thiogalactoside, IPTG
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
EC Number:
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PubChem Substance ID:

Quality Level

biological source


storage temp.


SMILES string




InChI key


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IPTG is commonly used in cloning procedures that require induction of β-galactosidase activity. It is used in conjunction with X-Gal or Bluo-Gal in blue-white selection of recombinant bacterial colonies that induce expression of the lac operon in Escherichia coli. IPTG functions by binding to the lacI repressor and altering its conformation, which prevents the repression of the β-galactosidase coding gene lacZ.

Other Notes

Non-metabolizable galactose analog.

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Simon van Vliet et al.
BMC microbiology, 14, 116-116 (2014-06-03)
Bacterial habitats, such as soil and the gut, are structured at the micrometer scale. Important aspects of microbial life in such spatial ecosystems are migration and colonization. Here we explore the colonization of a structured ecosystem by two neutrally labeled
Laam Li et al.
BMC genomics, 16, 637-637 (2015-08-27)
Legionella pneumophila (Lp) is a water-borne opportunistic pathogen. In water, Lp can survive for an extended period of time until it encounters a permissive host. Therefore, identifying genes that are required for survival in water may help develop strategies to
Farshid Hadifar et al.
PloS one, 9(10), e108420-e108420 (2014-10-21)
Killed avian influenza virus (AIV) vaccines have been used to control H5N1 infections in countries where the virus is endemic. Distinguishing vaccinated from naturally infected birds (DIVA) in such situations however, has become a major challenge. Recently, we introduced the
B K Kishore Reddy et al.
Antimicrobial agents and chemotherapy, 58(6), 3312-3326 (2014-04-02)
Pantothenate kinase (PanK) catalyzes the phosphorylation of pantothenate, the first committed and rate-limiting step toward coenzyme A (CoA) biosynthesis. In our earlier reports, we had established that the type I isoform encoded by the coaA gene is an essential pantothenate
Gustavo M Cerqueira et al.
The Journal of infectious diseases, 210(1), 46-55 (2014-01-17)
Acinetobacter baumannii is one of the most notorious hospital-acquired pathogens, and novel treatment strategies are desperately required. Two-component regulatory systems represent potential therapeutic targets as they mediate microorganism adaptation to changing environments, often control virulence, and are specific to bacteria.

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