Le X-Gal (5-bromo-4-chloro-3-indolyl-β-D-galactoside) est un substrat histochimique pour la β-galactosidase.Ce substrat donne un précipité bleu lors de l’hydrolyse, ce quiAfficher plus
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Type de produit
15520018
1 g
X-Gal
15520034
100 mg
X-Gal
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Référence 15520018
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403,65
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416,00
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Quantité:
1 g
Type de produit:
X-Gal
Prix (EUR)
403,65
Online Exclusive
416,00
Économisez 12,35 (3%)
Each
Le X-Gal (5-bromo-4-chloro-3-indolyl-β-D-galactoside) est un substrat histochimique pour la β-galactosidase.Ce substrat donne un précipité bleu lors de l’hydrolyse, ce qui le rend adapté à une utilisation dans des dosages immunoblotiques ou immunocytochimiques.Les bactéries contenant de la β-galactosidase active produisent des colonies bleues lorsqu’elles sont cultivées sur des plaques contenant du X-Gal. Le X-Gal est fourni sous forme de cristaux blancs, solubles dans le diméthylformamide.
Usage exclusivement réservé à la recherche. Ne pas utiliser pour des procédures de diagnostic.
Spécifications
Nom chimique ou matériau5-bromo-4-chloro-3-indolyl-β-D-galactoside
DescriptionX-Gal, perméant aux cellules
À utiliser avec (application)Immunotransfert
Type de produitX-Gal
Quantité1 g
Conditions d’expéditionExpédition à température ambiante ou sur gglace humide
Méthode de détectionColorimétrique
FormePoudre
FormatBottle
Unit SizeEach
Contenu et stockage
Contient 1 g de X-Gal, poudre
Foire aux questions (FAQ)
Can X-gal be resuspended in dimethylsulfoxide (DMSO) instead of dimethylformamide (DMF)? How are X-gal plates prepared for blue/white screening?
X-gal (also known as 5-bromo-4-chloro-3-indolyl-?-D-galactoside) is soluble in either DMSO or DMF, and can be stored in solution in the freezer for up to 6 months. Protect the solution from light.
To add X-gal to previously made agar plates, pipette 40 ?l of a 40 mg/ml stock solution onto a 100mm pre-poured agar plate and spread evenly with a sterile spreader. Let dry 15 minutes and store plates away from light.
How do I resuspend IPTG and X-Gal?
IPTG can be reconstituted in water. Make a stock of 100 mM in water and store working aliquots at -20°C. X-gal can be reconstituted in DMSO, or in a 50:50 mix of DMSO and water. To do the latter, you must dissolve in DMSO first, and then add water to bring up to final volume. It is not necessary to filter sterilize these solutions.
The X-gal solution should be protected from light. To make plates, add 50 ug/ml X-gal and 1 mM (0.24 mg/mL) IPTG to LB/agar that has been cooled down to 50°C. To spread on top of plates, use 50 µl 2% stock of X-gal and 30 µl 100 mM stock of IPTG.
Identification of endopeptidase genes from the genomic sequence of Lactobacillus helveticus CNRZ32 and the role of these genes in hydrolysis of model bitter peptides.
Authors:Sridhar VR, Hughes JE, Welker DL, Broadbent JR, Steele JL,
Journal:Appl Environ Microbiol
PubMed ID:15932998
Genes encoding three putative endopeptidases were identified from a draft-quality genome sequence of Lactobacillus helveticus CNRZ32 and designated pepO3, pepF, and pepE2. The ability of cell extracts from Escherichia coli DH5alpha derivatives expressing CNRZ32 endopeptidases PepE, PepE2, PepF, PepO, PepO2, and PepO3 to hydrolyze the model bitter peptides, beta-casein (beta-CN) ... More