Can X-gal be dissolved in DMSO?
X-gal is soluble in organic solvents such as DMSO and dimethyl formamide. The solubility of X-gal in these solvents is approximately 30 mg/ml. X-gal is sparingly soluble in aqueous buffers.
What do you dissolve X-gal in?
DMSO
X-GAL is soluble in N, N-dimethylformamide or dimethylsulfoxide (DMSO).
What is X-gal used for?
X-Gal is a widely used chromogenic substrate for β-galactosidase. It yields a dark blue precipitate at the site of enzymatic activity. X-Gal is useful for numerous histochemical and molecular biology applications, including detection of lacZ activity in cells and tissues.
What is Compound X-gal?
Explanation: X-gal is a lactose analog which is broken down by enzyme beta-galactosidase to give a product deep blue in color.
What does Onpg do?
O-nitrophenyl ß-galactoside (ONPG) is another lactose analogue. It can be used to quantitatively measure the enzyme activity of ß-galactosidase. ONPG is a colourless substrate that can be cleaved by the enzyme ß-galactosidase to yield stoichiometric amounts of yellow o-nitrophenol and colourless galactose.
What type of solvent is DMSO?
organosulfur solvent
Dimethylsulfoxide (DMSO) is a colorless organosulfur solvent, which dissolves both polar and non-polar compounds and is miscible in a wide range of organic solvents as well as in water.
How do you make DMSO solution?
1. Prepare a solution of 10X fatty acids in pure DMSO (solution 1). 2. Place 10 mL of solution 1 in a beaker, shake vigorously with a magnetic stirrer and slowly add 90 mL of water.
Why do you add ONPG?
☰ The ONPG test is used to detect the enzyme β-galactosidase , present in late lactose fermenters (Late lactose fermenters are very difficult to distinguish from non-lactose fermenters because both appear under form colorless colonies on MacConkey agar).
Why is DMF used as a solvent?
The solvent properties of DMF are particularly attractive because of the high dielectric constant, the aprotic nature of the solvent, its wide liquid range and low volatility. It is frequently used for chemical reactions and other applications, which require a high solvency power.
How do you make 1% DMSO?
If I had dissolved 50 ug powder into 50 uL DMSO to make a stock solution, that would give it 1% DMSO concentration. Then, if I was to use 10 ug of this stock, the final DMSO concentration would be 0.2%.
How do you make 5 percent DMSO?
1. Take 5 mL of pure DMSO with a volumetric pipette and transfer it to a 100 mL volumetric flask. 2. Add the solvent (your question does not make it clear if your solution is aqueous) on a volumetric flask until the mark is completed.
What is the function of ONPG?
Can I mix DMF and DMSO?
its depend on your application, if you want sulfa or not in your solution? Both solvents DMF and DMSO are good aprotic solvents. However, DMSO is more polar than DMF based on their dielectric constants.. So depending upon the nature of the reactioncondition , you can use either of two solvents.
What is DMF in organic chemistry?
Dimethylformamide is an organic compound with the formula (CH3)2NC(O)H. Commonly abbreviated as DMF (although this initialism is sometimes used for dimethylfuran, or dimethyl fumarate), this colourless liquid is miscible with water and the majority of organic liquids. DMF is a common solvent for chemical reactions.
Can X-gal powder be dissolved in DMSO instead of DMF?
Trof on Wed Sep 5 08:26:00 2018 said: We recently dissolved our X-gal powder in DMSO instead of DMF, as it was before, because it is less toxic, and sparing all the troubles of getting it from the locker in the basement It was stored in -20.
What is the final concentration of X-gal in DMF?
A stock solution of X-gal is commonly made with 20 mg/ml X-gal in DMF (dimethylformamide). When pouring agar plates, a typical final concentration is 20 μg/ml. Note that DMF is toxic. Take care when preparing X-Gal solution.
Does DMSO/DMF affect E coli growth?
Join ResearchGate to ask questions, get input, and advance your work. I’ve never had any trouble with E. coli growth after spread plating either 100 µL DMSO or dimethylformamide (DMF) on the tops of plates, even without letting it diffuse for any length of time after absorbing into the plates.
What is the shelf life of DMF and DMSO?
When frozen: you can even only store it for +- a year in DMF and in DMSO only a half year… so it is less stable in DMSO.