What is a discontinuous gel?

Discontinuous electrophoresis (colloquially disc electrophoresis) is a type of polyacrylamide gel electrophoresis. It was developed by Ornstein and Davis. This method produces high resolution and good band definition. It is widely used technique for separating proteins according to size and charge.

How long is the run time for the mini gel?


Capacity: Up to 2 gels per run
Max. Voltage: 500 V dc
Running Time: 35 min
Type: Mini Gel Tank
Gel Compatibility: Bolt™ Bis-Tris Plus Gels, Novex™ Mini Gels

How do you use protein gel?

Running the gel Add 200 ml of Tris-Glycine Running buffer that contains 500 μl of Nupage antioxidant to the inner chamber, and 300 ml of Tris-Glycine Running buffer to the outer chamber. Load the denatured protein samples (15 μl) into the wells using a gel loading pipette tip. Run the gel at 200 V for 60-70 min.

What is Native page used for?

Native polyacrylamide gel electrophoresis (PAGE) is most suitable for studying the composition and structure of native proteins, as both their conformation and biological activity will remain intact during the analysis.

Why do we use SDS-PAGE?

Sodium dodecyl-sulfate polyacrylamide gel electrophoresis (SDS-PAGE) is commonly used to obtain high resolution separation of complex mixtures of proteins. The method initially denatures the proteins that will undergo electrophoresis.

Why discontinuous gel is used?

The major advantages of discontinuous buffer systems are that relatively large volumes of dilute protein samples can be applied to the gel and resolution is much greater than that obtained with continuous systems.

What is discontinuous system?

Description. In a discontinuous system, gradients in continuous systems across the length, l, of the diffusion path [m], are replaced by differences across compartmental boundaries of zero thickness, and the local concentration is replaced by the free activity, α [mol·dm-3].

What is the purpose of protein gel electrophoresis?

Gel electrophoresis is used to separate macromolecules like DNA, RNA and proteins. DNA fragments are separated according to their size. Proteins can be separated according to their size and their charge (different proteins have different charges).

What is a native PAGE gel?

CN-PAGE (commonly referred to as Native PAGE) separates acidic water-soluble and membrane proteins in a polyacrylamide gradient gel. It uses no charged dye so the electrophoretic mobility of proteins in CN-PAGE (in contrast to the charge shift technique BN-PAGE) is related to the intrinsic charge of the proteins.

Do you need colorless native gel for BN-PAGE?

In these cases, a CN-PAGE or Colorless Native gel that lacks the anionic G-250 dye may be preferred. Despite certain limitations, BN-PAGE remains a staple technique for molecular biology labs because it is inexpensive, requires no specialized equipment and compatibility with most protein detection methods.

What are the features of the native PAGE gel?

Features of the NativePAGE Bis-Tris Gel System include: Wide molecular weight resolving range, from 15 kDa to 10 MDa. Neutral-pH separation, which better preserves the native state of protein complexes. Resolution of all proteins in the gel regardless of their isoelectric point (pI)

What can BN PAGE be used for in medicine?

Since then, BN-PAGE has been used for diverse applications including clinical diagnosis, assessing stochiometric amounts of native complexes and identifying protein-protein interactions.

What is Invitrogen native PAGE Bis-tris gel system?

The Invitrogen NativePAGE Bis-Tris Gel System is a precast polyacrylamide mini-gel system that provides sensitive, high-resolution analysis of native proteins and protein complexes for molecular mass estimations, and assessment of purity.