IPTG-RO

Isopropyl-β-D-thiogalactoside

mol wt 238.3, pkg of 1 g (10724815001), pkg of 5 g (11411446001)

• Synonym(s): Isopropyl β-D-1-thiogalactopyranoside, iptg, IPTG, Isopropyl β-D-thiogalactoside
• Empirical Formula (Hill Notation): C₉H₁₈O₅S
• CAS Number: 367-93-1
• Molecular Weight: 238.30
• PubChem Substance ID: 329815691
• UNSPSC Code: 12352200
• Beilstein/REAXYS Number: 4631
• MDL number: MFCD00063273
• NACRES: NA.54

Properties

• form: powder
• mol wt: 238.3
• packaging: pkg of 1 g (10724815001), pkg of 5 g (11411446001)
• manufacturer/tradename: Roche
• shipped in: wet ice
• storage temp.: 2-8°C
• SMILES string: CC(C)S[C@@H]1OC(CO)[C@H](O)C(O)[C@H]1O
• InChI: 1S/C9H18O5S/c1-4(2)15-9-8(13)7(12)6(11)5(3-10)14-9/h4-13H,3H2,1-2H3/t5-,6+,7+,8-,9+/m1/s1
• InChI key: BPHPUYQFMNQIOC-NXRLNHOXSA-N

Description

General description

Isopropyl-β-D-thiogalactoside (IPTG) is a chemical analog of galactose that cannot be cleaved by β-galactosidase. IPTG functions by binding to the lacI repressor and altering its conformation, which prevents the repression of the β-galactosidase coding gene lacZ.

Application

Isopropyl-β-D-thiogalactoside (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. It has been used for the expression of recombinant genes in E. coli.

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.

Features and Benefits

Assay Time: 50minutes
Specific Activity: The described standard assay will results in a specific activity of 1.8 x 10⁹ dpm/μg, corresponding to 65% incorporation with different substrate DNAs in 30minutes. When varying the ratio of template DNA to labeled dNTP, similar incorporation rates, but different levels of specific activity of the labeled probe are obtained.

Preparation Note

Sample Material
10 ng to 3μg template DNA, linearized and at least 100 to 200bp long

Working concentration: Final concentration should be 0.2 mM.
Storage conditions (working solution): Stock solutions of the product in water (e.g., 1 M IPTG) stored at -15 to -25 °C, are stable up to six months.

Other Notes

For life science research only. Not for use in diagnostic procedures.

Non-metabolizable galactose analog.

The amount of labeled DNA depends on:

• amount of template DNA
• purity of template DNA
• conformation of template DNA
• average size of labeled fragment

Safety Information

• WGK: WGK 1
• Flash Point (°F): Not applicable
• Flash Point (°C): Not applicable