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Fluorescence

Fluorescence is the emission of electromagnetic radiation, especially of visible light, stimulated in a substance by the absorption of incident radiation and persisting only as long as the stimulating radiation is continued. Fluorescence is important in molecular biology. Fluorescence is used in DNA sequencing. Fluorescence is used in labeling and visualising DNA. Fluorescence is used in DNA chip technology, fluorescence microscopy and green fluorescent protein GFP.
PCR Troubleshooting and Optimization
Edited by: Suzanne Kennedy and Nick Oswald
Control, optimize and troubleshoot PCR, reverse transcriptase PCR, real-time PCR and quantitative PCR. An essential book.
"an essential book ... a valuable tool to all those interested in PCR" (Doodys); "an essential guide" Aus. J. Med. Sci. read more ...

Fluorescence

Fluorescence is important in automated sequencing of DNA. Each of four different chain terminating bases has its own specific fluorescent tag. In fluorescent sequencing the labelled DNA molecules are separated, the fluorescent label is excited by a UV source, and the base is identified by the wavelength of the emitted light. Fluorescence is used in DNA detection. Ethidium bromide has low fluorescence until it binds to DNA. This fluorescence is ussful in visualising the location of DNA fragments in agarose gel electrophoresis. Fluorescence is used in DNA chip technology. Fluorescence is used in microscopy and immunology. FACS (fluorescent-activated cell sorting). Fluorescence can be useful in analysis of the structure and conformations of DNA and proteins. Aequorea victoria, produces a blue fluorescence in the presence of Ca2+ ions. Green Fluorescent Protein (GFP) is an important research tool. The fluorescence of GFP and related proteins are used as reporters in a number of systems. Gene expression can be measured by fluorescence by fusion of a GFP gene to the gene being studied.