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Fontos dokumentumok
S7313
S-Gal® sodium salt
reagent for selection of recombinant bacterial clones
Szinonimák:
3,4-Cyclohexeneoesculetin-B-D-galactopyranoside sodium salt
Bejelentkezésa Szervezeti és Szerződéses árazás megtekintéséhez
Összes fotó(3)
About This Item
Tapasztalati képlet (Hill-képlet):
C19H21O9Na
Molekulatömeg:
416.35
MDL-szám:
UNSPSC kód:
12352200
NACRES:
NA.85
Javasolt termékek
grade
for molecular biology
sterilitás
non-sterile
Teszt
≥95% (HPLC)
Forma
powder
IVD (In vitro diagnosztika)
not for in vitro diagnostic use
oldhatóság
H2O: 100 mg/mL
alkalmasság
suitable for β-galactosidase test
tárolási hőmérséklet
room temp
Általános leírás
S-Gal® (sodium salt) is an autoclavable, water-soluble, 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.
Alkalmazás
S-Gal, sodium salt is a patented water-soluble, 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.
Tulajdonságok és előnyök
- More intense color contrast than X-gal
- Water-soluble and autoclavable for easiest use
- Excellent for use in automated colony counters
- 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, Sodium salt is water soluble, eliminating the need for solvents such as dimethyl formamide. S-Gal is also 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.
Egyéb megjegyzések
More water soluble version, soluble >50 mg/mL.
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.
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.
Vigyázat
For black color development to occur, ferric ion must be present. Although we recommend ferric ammonium citrate (500 mg/L of media), other ferric compounds can be used to provide this requirement, depending upon your particular system.
Elv
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.
Kapcsolódás
Ferric Ammonium Citrate (F5879), LB Agar (L2897), IPTG (Isopropyl β-D-thiogalactopyranoside, I6758), Ampicillin (A2804), Kanamycin (K0879), Chloramphenicol (C7795), Tetracycline (T8032)
Feloldás
Add to agar media pre-autoclaving at a recommended concentration of 300 mg S-Gal/L of media, along with 500 mg/L Ferric Ammonium Citrate (F5879). Stock solutions of S-Gal can be made by dissolving at 50 mg/mL in deionized water, sterile-filtering and storing at -20 °C.
Stock solutions of S-Gal® (sodium salt) can be made by dissolving 50mg/ml in water, dimethyl formamide (DMF) or DMSO. Filter sterilize and store at -20C. Add S-gal® (300 mg/L from stock solution or powder) and Ferric Ammonium Citrate (500mg/L) to agar media prior to autoclaving.
Jogi információk
S-GAL is a registered trademark of Merck KGaA, Darmstadt, Germany
kapcsolódó termék
Product No.
Leírás
Árazás
Tárolási osztály kódja
11 - Combustible Solids
WGK
WGK 3
Lobbanási pont (F)
Not applicable
Lobbanási pont (C)
Not applicable
Egyéni védőeszköz
Eyeshields, Gloves, type N95 (US)
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