5-bromo-4-chloroindol-3-yl β-D-galactopyranoside
Also known as Indoxyl-Gal, X-Gal, BCIG, 5-bromo-4-chloroindol-3-yl-beta-D-galactopyranoside, 5-bromo-4-chloro-3-indolyl beta-galactoside
X-gal (also abbreviated BCIG for 5-bromo-4-chloro-3-indolyl-β--galactopyranoside) is an organic compound consisting of galactose linked to a substituted indole. The compound was synthesized by Jerome Horwitz and collaborators in 1964. The formal chemical name is often shortened to less accurate but also less cumbersome phrases such as bromochloroindoxyl galactoside. The X from indoxyl may be the source of the X in the X-gal contraction. X-gal is often used in molecular biology to test for the presence of an enzyme, β-galactosidase, in the place of its usual target, a β-galactoside. It is also
Research
1 papers- Improvement of receptor-mediated gene delivery to HepG2 cells using an amphiphilic gelling agent.Biotechnology and applied biochemistry · 2000
via PubMed
Wikidata facts
- Mass
- 406.977
Show 4 more facts
- chemical formula
- C₁₄H₁₅BrClNO₆
- canonical SMILES
- C1=CC(=C(C2=C1NC=C2OC3C(C(C(C(O3)CO)O)O)O)Cl)Br
- isomeric SMILES
- C1=CC(=C(C2=C1NC=C2O[C@H]3[C@@H]([C@H]([C@H]([C@H](O3)CO)O)O)O)Cl)Br
- Commons category
- X-Gal
Sources (3)
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Article
7 sectionsContents
- Uses
- Reaction
- Cloning
- Variants
- Protein-protein interactions
- See also
- References
X-gal (also abbreviated BCIG for 5-bromo-4-chloro-3-indolyl-β--galactopyranoside) is an organic compound consisting of galactose linked to a substituted indole. The compound was synthesized by Jerome Horwitz and collaborators in 1964. The formal chemical name is often shortened to less accurate but also less cumbersome phrases such as bromochloroindoxyl galactoside. The X from indoxyl may be the source of the X in the X-gal contraction. X-gal is often used in molecular biology to test for the presence of an enzyme, β-galactosidase, in the place of its usual target, a β-galactoside. It is also used to detect activity of this enzyme in histochemistry and bacteriology. X-gal is one of many indoxyl glycosides and esters that yield insoluble blue compounds similar to indigo dye as a result of enzyme-catalyzed hydrolysis.
A less often used but very similar (chiral) compound is X-\alpha-gal (Xαgal, X-alpha-gal), or 5-Bromo-4-chloro-3-indolyl-α-D-galactopyranoside, which is hydrolyzed by α-galactosidase (EC 3.2.1.22) instead of β-galactosidase (EC 3.2.1.23).