Ethidium Bromide CAS:1239-45-8

Ethidium bromide (EtBr) is a common fluorescent dye used in molecular biology and biochemistry for visualizing nucleic acids, specifically DNA, in agarose gel electrophoresis. It has a high affinity for DNA and, when exposed to ultraviolet (UV) light, fluoresces and emits a reddish-orange color. This allows researchers to easily detect and analyze DNA fragments separated by size in a gel matrix. EtBr intercalates between the base pairs of DNA and RNA, causing a change in its fluorescence properties. It is commonly added to agarose gels or mixed with DNA samples prior to electrophoresis. When the gel is exposed to UV light, the DNA bands containing EtBr appear as bright orange bands against a dark background, making it easy to visualize and analyze the DNA fragments. 

Products Details

Application and Effect

DNA/RNA Visualization: EtBr is most commonly used to visualize DNA and RNA in agarose gel electrophoresis. It intercalates between the base pairs of the nucleic acid molecules, causing them to fluoresce when exposed to UV light. This allows researchers to visualize and analyze the separation of DNA or RNA fragments based on their size or sequence. DNA Staining: EtBr can be used to stain DNA in various experimental procedures. It can be added to DNA samples, such as purified plasmids or PCR products, to verify their presence and concentration. The stained DNA can then be visualized using UV light or a gel imaging system. DNA Quantification: EtBr can be used for quantifying DNA concentration. By comparing the intensity of EtBr-stained DNA bands in an agarose gel with known standards of DNA concentration, the approximate amount of DNA in a sample can be determined. Fluorescent Microscopy: EtBr can be employed in fluorescence microscopy to stain and visualize DNA in living cells or tissues. It allows researchers to study DNA localization and dynamics within cells or observe DNA fragmentation in apoptotic cells.

Product Packing:

Additional Information:

Composition C21H20BrN3
Assay 99%
Appearance Red to dark purple powder
CAS No. 1239-45-8
Packing Small and bulk
Shelf Life 2 years
Storage Store in cool and dry area
Certification ISO.
 

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