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Difference between Agarose and Polyacrylamide

Difference between Agarose and Polyacrylamide

Agarose and polyacrylamide are both used in gel electrophoresis, a process that separates molecules based on their size and shape. While they share some commonalities, there are also some key differences between them. In this article, we’ll take a closer look at these two gelling agents, explore how they differ, and discuss which one might be best suited for your needs.

What is Agarose?

Agarose is a polysaccharide that is derived from seaweed. It is the major component of agar, and it is used in a variety of applications, including electrophoresis, cell culture, and microbiology. Agarose is a strong gel former, and it has a wide range of melting and gelling temperatures. Agarose gels are also very resistant to degradation by enzymes. Agarose is available in a variety of forms, including powder, flakes, and beads. Agarose can be purchased from scientific supply companies or online retailers.

What is Polyacrylamide?

Polyacrylamide is a synthetic polymer that has a wide range of applications. It is most commonly used as a flocculant or a substance that helps to bind together particles in a liquid. Polyacrylamide can be added to water to help remove suspended solids, or it can be used in drilling fluids to help protect against the formation of cuttings. Polyacrylamide is also often used in the food industry as an emulsifier or a substance that helps to keep oil and water from separating. In addition, polyacrylamide is commonly used in papermaking and textile production. Polyacrylamide is generally considered to be safe, although it can cause skin irritation if direct contact occurs.

Difference between Agarose and Polyacrylamide

Agarose and Polyacrylamide are two of the most commonly used biomaterials in laboratory research. Agarose is a polysaccharide derived from red algae, while polyacrylamide is a synthetic polymer. Both materials have a wide range of uses, including electrophoresis, blotting, chromatography, and tissue engineering. Agarose is generally more expensive than polyacrylamide, but it has some advantages over its synthetic counterpart. Agarose gels are stronger and more resistant to degradation than polyacrylamide gels. In addition, agarose can be easily purified from natural sources, making it a more biocompatible material. However, polyacrylamide has some advantages of its own. It is easier to modify the properties of polyacrylamide, and it can be produced in large quantities at a lower cost. As a result, both agarose and polyacrylamide have their own strengths and weaknesses, making them suitable for different applications in the laboratory.


Agarose and polyacrylamide are two of the most common gels used in molecular biology. They have different properties that make them useful for different applications. Agarose is a high-molecular-weight polymer made from agar, a seaweed extract. It is often used to separate DNA fragments by size. Polyacrylamide is a low-molecular-weight polymer made from acrylamide monomers. It is often used to resolve proteins by their electrophoretic mobility. Both gels have their place in the lab, and it’s important to understand the difference between them so you can choose the right one for your application.

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