Phycoerythrin
Phycoerythrin (pronunciation: /ˌfaɪkoʊɪˈrɪθrɪn/) is a type of phycobiliprotein, a family of water-soluble proteins present in cyanobacteria and red algae.
Etymology
The term "Phycoerythrin" is derived from the Greek words "phyco" meaning seaweed and "erythros" meaning red.
Description
Phycoerythrin is a red protein-pigment complex from the light-harvesting phycobiliprotein family, present in red algae and cyanobacteria. It absorbs blue light, and emits fluorescence at a longer wavelength, making it useful in fluorescence microscopy and flow cytometry.
Phycoerythrin is composed of two subunits, alpha and beta, which are associated with chromophores. The chromophores allow the protein to absorb light at different wavelengths. The protein's red color is due to the presence of these chromophores.
Related Terms
- Phycocyanin: Another type of phycobiliprotein, which is blue in color.
- Allophycocyanin: A phycobiliprotein that is purple-blue in color.
- Phycobilisome: The light-harvesting complex in cyanobacteria and red algae.
See Also
External links
- Medical encyclopedia article on Phycoerythrin
- Wikipedia's article - Phycoerythrin
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