DNA Electrophoresis

What is DNA electrophoresis?

Electrophoresis is a common lab technique used to identify, quantify, and purify nucleic acid fragments. Samples are loaded into wells of an agarose or acrylamide gel and subjected to an electric field, causing the negatively charged nucleic acids to move toward the positive electrode. Shorter DNA fragments will travel more rapidly, whereas the longest fragments will remain closest to the origin of the gel, resulting in separation based on size.

Learn more about Nucleic acid electrophoresis

Agarose Gels

We offer pre-cast agarose gels as well as convenient reagents for agarose gel electrophoresis including hassle-free precast Invitrogen E-Gel agarose gels, and Invitrogen UltraPure reagents for pouring your own agarose gels.

Select from gels for:

Polyacrylamide Gels

Polyacrylamide is a cross-linked polymer that provides very high resolution of DNA molecules in the 10–3,000 bp size range. Under the appropriate conditions, DNA molecules differing in size by a single base pair can be resolved. We offer convenient reagents for polyacrylamide gel electrophoresis, including hassle-free pre-cast Invitrogen Novex TBE gels and UltraPure reagents.

DNA Ladders and Markers

We offer a broad selection of DNA ladders and markers ranging from 10 bp to 50 kb for accurate analysis of linear double-stranded DNA in agarose gels. A variety of these ladders is available in the ready-to-use Invitrogen TrackIt and E-Gel formats, including the 1 Kb DNA Ladder and the 100 bp DNA Ladder.

DNA Stains

We've developed a range of DNA stains, including Applied Biosystems SYBR Safe DNA gel stain and ethidium bromide. SYBR Safe DNA gel stain offers detection sensitivity similar to that of ethidium bromide, but with much reduced toxicity and mutagenicity.

DNA Loading Buffer

We offer a variety of gel loading buffers for easy loading and tracking of DNA samples including the Invitrogen BlueJuice Gel Loading Buffer and TrackIt loading buffers. Our gel loading buffers include one or two tracking dyes (bromophenol blue, xylene cyanol FF, orange G, tartrazine) to monitor the progress of electrophoresis by migration of the dye. 

Buffers and Reagents

The electrophoretic mobility of DNA molecules depends on the applied voltage and the buffer composition. We offer a selection of UltraPure buffers and reagents to meet your DNA electrophoresis needs, including 10X TBE solution and 10X TAE buffer. UltraPure products are made from the highest purity biochemicals for maximum reliability and superior performance. 

Thermo Scientific DNA Electrophoresis

Thermo Scientific electrophoresis reagents are designed with accuracy in mind. Our broad range of products includes GeneRuler DNA ladders that are ideal for sizing and in-gel DNA quantification of a wide range of double-stranded DNA molecules, and TopVision agarose providing excellent gel transparency and low DNA/RNA binding.

Thermo Scientific Owl Gel Electrophoresis Systems

Horizontal (agarose) or vertical (polyacrylamide) gel electrophoresis of nucleic acids and protein using tanks, chambers, casters, plates, spacers, combs, power supplies, and other accessories.