DNA sequencing

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Images

Diagram of a DNA double helix showing its twisted ladder structure, with a close-up of the sugar-phosphate backbone, paired nitrogenous bases (adenine, thymine, cytosine, guanine), and labeled nucleotides and hydrogen bonds.

In gel electrophoresis an electric field is applied to a buffer solution covering an agarose gel, which has slots at one end containing DNA samples. The negatively charged DNA molecules travel through the gel toward a positive electrode and are separated based on size as they advance.

Computer monitor displaying DNA sequencing data with multicolored horizontal bands and vertical columns, labeled with numerical markers along the left side.

DNA sequencing: Media

genetics

Images

Diagram of a DNA double helix showing its twisted ladder structure, with a close-up of the sugar-phosphate backbone, paired nitrogenous bases (adenine, thymine, cytosine, guanine), and labeled nucleotides and hydrogen bonds.

DNA

DNA molecule.

Encyclopædia Britannica, Inc.

In gel electrophoresis an electric field is applied to a buffer solution covering an agarose gel, which has slots at one end containing DNA samples. The negatively charged DNA molecules travel through the gel toward a positive electrode and are separated based on size as they advance.

In gel electrophoresis an electric field is applied to a buffer solution covering...

Encyclopædia Britannica, Inc.

Computer monitor displaying DNA sequencing data with multicolored horizontal bands and vertical columns, labeled with numerical markers along the left side.

DNA sequencing

A nucleotide sequence determined using DNA sequencing technologies.

© Ryan McVay—Photodisc/Getty Images

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