Define the disc electrophoresis, Biology

Assignment Help:

Define the Disc Electrophoresis?

Disc electrophoresis has improved resolution and strong bands are obtained. It requires a two-gel system and several different buffers. The running gel in which the separation takes place is prepared and then overlaid by a short (1 cm), large- pored "Stacking" or "Spacer gel". The buffer in the lower reservoir and in the running gel is as described before, while that in the sample solution and in the stacking gel has a pH about two units less than that of the lower reservoir. When the current is switched on, the buffer ions from the upper reservoir migrate into the stacking gel as the stacking gel buffer ions migrate ahead of them. As this occurs, the upper reservoir buffer ions encounter a pH that is much lower than their pK.

They therefore assume their uncharged (or, in the case of glycine, zwitterionic) form and become electrophoretically immobile. This effect causes the macro-molecular ions to approach the running gel as stacks of very narrow (0.01 nm thick) bands or discs that are ordered according to their mobilities and lie between the migrating ions of the upper reservoir and those of the stacking gel. As the macromolecular ions enter the running gel, they slow down as a result of gel filtration effects. This permits the upper reservoir buffer ions to overtake the macromolecular bands and because of the running gel's higher pH, assume their fully charged form as they too enter the gel and electroporetic separation is achieved.

The compactness of the macromolecular bands entering the running gel greatly increases the resolution of the macromolecular separations. With a study of disc electrophoresis we come to an end of our study about electrophoresis. We hope you did not find the discussion presented in this section too technical. Just for your reference, we shall not be conducting any electrophoresis experiment during our laboratory work for this course, but it is important that you, as a student of dietetics, understand the concept and principle of electrophoresis clearly, since this is one important investigative technique used for research in the field of nutritional biochemistry. We suggest you now answer the questions included in the review question section included herewith. This will help you consolidate your understanding about electrophoresis.

 


Related Discussions:- Define the disc electrophoresis

Determine requirement of trace elements for infant, Determine Requirement o...

Determine Requirement of Trace elements for Infant? Most elements, such as zinc and iodine, hold a major significance in infant nutrition. Zinc is associated with growth while

Cell membrane, CELL MEMBRANE It is biological, thin, elastic, flexib...

CELL MEMBRANE It is biological, thin, elastic, flexible & selective permeable membrane. Term "Cell membrane" was coined by Negeli & Crammer 1855. Term " Plasma membr

Explain working of dietitians and nutritionists, Dietitians and nutritionis...

Dietitians and nutritionists Dietitians and nutritionists, who are associated with hospitals and clinics generally have regular work hours. At times, they may be required to wo

Determine the term anapsid , Determine the term Anapsid ? The type of s...

Determine the term Anapsid ? The type of skull found in reptiles and seen today only in turtles. Behind the opening of the orbits the skull is solid and lacks temporal openings

Which groups does not contain a carbonyl, Which of the following functional...

Which of the following functional groups does NOT contain a carbonyl? Select one: a. Aldehyde b. Carboxyl c. Phosphate d. Amide e. Organic ester

Does the molecule will remain unchanged, A double-stranded piece of DNA, 10...

A double-stranded piece of DNA, 100 base pairs in size, is exposed to a high pH environment. This causes all non-valent interactions to be disrupted. What will result from this tre

Procedures for diagnosis - monoclonal antibodies, M o n o c ...

M o n o c l o n a l antibodies: Hybridoma technology for production of monoclonal antibodies is one of the most important advancements in the f

Aeolian-transported soil, Aeolian Wind transported materials constitute...

Aeolian Wind transported materials constitute this category. This can be further divided into dunes or loess. Dunes are found in thr& types of situations. Fitly, these may occu

Explain the process of determination of vitamin C, Determination of vitamin...

Determination of vitamin c Majority of chemical methods of determination is based on the rapid oxidation of ascorbic acid and therefore not too highly specific. Titration of

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd