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| Pack Size | SKU | Availability | Price |
|---|---|---|---|
| 1 g | Estimated to ship onMay 19, 2026fromMILWAUKEE | $98.30 | |
| 5 g | Estimated to ship TODAYfromMILWAUKEE | $364.00 |
About This Item
Empirical Formula (Hill Notation):
C9H18O5S
CAS Number:
Molecular Weight:
238.30
PubChem Substance ID:
UNSPSC Code:
12352200
Beilstein/REAXYS Number:
4631
MDL number:
NACRES:
NA.54
$98.30
Estimated to ship onMay 19, 2026Details
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
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.[1]
Application
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.
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.[2][3]
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.
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
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.
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
1 of 1
This Item | |||
|---|---|---|---|
| form powder | form liquid | form solid | form solid |
| storage temp. 2-8°C | storage temp. −20°C | storage temp. 2-8°C | storage temp. 2-8°C |
| packaging pkg of 1 g (10724815001), pkg of 5 g (11411446001) | packaging - | packaging - | packaging - |
| shipped in wet ice | shipped in dry ice | shipped in ambient | shipped in ambient |
| manufacturer/tradename Roche | manufacturer/tradename - | manufacturer/tradename Calbiochem® | manufacturer/tradename Calbiochem® |
| mol wt 238.3 | mol wt 238.3 | mol wt - | mol wt - |
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Storage Class
11 - Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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The role of the Escherichia coli lacY gene product (the lactose permease) in the induction of isopropyl-beta-D-thiogalactopyranoside (IPTG) inducible promoters was studied in E. coli and P. fluorescens. This was done by comparing strains containing a lacIPOZYA chromosomal insert with
Global Trade Item Number
| SKU | GTIN |
|---|---|
| 10724815001 | 04061838674692 |
| 11411446001 | 04061838701701 |