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Merck

S9811

Sigma-Aldrich

S-Gal®

reagent for selection of recombinant bacterial clones

Synonym(e):

3,4-Cyclohexenoesculetin-β-D-galactopyranosid

Anmeldenzur Ansicht organisationsspezifischer und vertraglich vereinbarter Preise


About This Item

Empirische Formel (Hill-System):
C19H22O9
CAS-Nummer:
Molekulargewicht:
394.37
UNSPSC-Code:
12352200
PubChem Substanz-ID:
NACRES:
NA.85

Qualität

for molecular biology

Qualitätsniveau

Sterilität

non-sterile

Assay

≥95% (HPLC)

Form

powder

Löslichkeit

DMF: 50 mg/mL

Eignung

suitable for β-galactosidase test

Lagertemp.

room temp

SMILES String

OC[C@H]1O[C@@H](Oc2cc3OC(=O)C4=C(CCCC4)c3cc2O)[C@H](O)[C@@H](O)[C@H]1O

InChI

1S/C19H22O9/c20-7-14-15(22)16(23)17(24)19(28-14)27-13-6-12-10(5-11(13)21)8-3-1-2-4-9(8)18(25)26-12/h5-6,14-17,19-24H,1-4,7H2/t14-,15+,16+,17-,19-/m1/s1

InChIKey

HDJJDRXZHJRVGA-DIKXUDHVSA-N

Allgemeine Beschreibung

S-Gal® is an autoclavable, chromogenic substrate for β-galactosidase, used to determine the presence or absence of a cloned DNA insert in bacteria growing on agar plates. S-Gal® is designed to replace X-Gal in blue-white selection of recombinant bacterial colonies with the lac+ phenotype.

Anwendung

Suitable for use in selection of recombinant bacterial colonies with the lac+ phenotype. S-Gal® is autoclavable and can be added to bacterial broth containing agar prior to autoclaving.
S-Gal is a patented autoclavable chromogenic substrate for β-galactosidase that is designed to replace X-Gal in blue-white selection of recombinant bacterial colonies with the lac+ phenotype.

Leistungsmerkmale und Vorteile

  • More intense color contrast than X-gal
  • Excellent for use in automated colony counters
  • Autoclavable for easiest use
  • No need to make stock solutions
When S-Gal is cleaved by β-galactosidase, the resulting product will chelate ferric ion to create a black, insoluble precipitate. Lac+ colonies grown in the presence of S-Gal and ferric ion turn an intense black color, allowing for easy differentiation between lac+ and lac- colonies. S-Gal is autoclavable and can be added to your medium of choice prior to autoclaving. S-Gal is not light sensitive and does not require any protection from light sources.

Sonstige Hinweise

Autoklavierbares, Mikrowellen-geeignetes Wachstumsmedium, komplett mit S-Gal und IPTG.
The ferric or Fe3+ ion is required for color development and must be added to any S-Gal®
formulation. A medium prepared with S-Gal® is moderately dark due to the presence of ferric ammonium citrate. This darker background often provides enhanced contrast for automated colony counting or isolation.

Prinzip

When S-Gal® is cleaved by ß-galactosidase, the resulting product will chelate ferric ion to create a black, insoluble precipitate. Lac+ colonies grown in the presence of S-Gal® and ferric ion turn an intense black color, allowing for easy differentiation between lac+ and lac- colonies.

Rekonstituierung

Stock solutions of S-Gal® can be made by dissolving 50mg/ml in dimethyl formamide (DMF) and storing at -20C. Add S-Gal® (300 mg/L from stock solution ) and Ferric Ammonium Citrate (500mg/L) to agar media prior to autoclaving.

Rechtliche Hinweise

S-GAL is a registered trademark of Merck KGaA, Darmstadt, Germany

Piktogramme

Exclamation mark

Signalwort

Warning

Gefahreneinstufungen

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Zielorgane

Respiratory system

Lagerklassenschlüssel

11 - Combustible Solids

WGK

WGK 3

Flammpunkt (°F)

Not applicable

Flammpunkt (°C)

Not applicable

Persönliche Schutzausrüstung

dust mask type N95 (US), Eyeshields, Gloves


Analysenzertifikate (COA)

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