DNA gel analysis. Researcher examines an agarose gel containing DNA fragments using Ultra-Violet (UV) light. The DNA fragments have been stained with

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DNA gel analysis. Researcher examines an agarose gel containing DNA fragments using Ultra-Violet (UV) light. The DNA fragments have been stained with ethidium bromide and are seen as fluorescent violet bands on the gel (at lower right). The researcher is wearing a mask to protect his face from the UV light and gloves to protect his hands from the highly carcinogenic ethidium bromide. Agarose gels are a routine way in which fragments of DNA are separated by size. Samples containing various sized fragments are separated within a gel using an electric current. Such techniques are used during DNA fingerprint analysis and when isolating particular genes.

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Photo credit: © SIMON FRASER/SCIENCE PHOTO LIBRARY / Alamy / Afripics
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Keywords: agarose, biochemistry, biotechnology, bromide, dna, double, electrophoresis, ethidium, fluorescence, gel, genetic, genetics, helix, lab, laboratory, light, mapping, research, stain, uv