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Psychrophilic enzymes: hot topics in cold adaptation
Georges Feller1, Charles Gerday
1Laboratory of Biochemistry, Institute of Chemistry B6, University of Liège, B-4000 Liège-Sart Tilman, Belgium. gfeller@ulg.ac.be
Abstract:
More than three-quarters of the Earth's surface is occupied by cold ecosystems, including the ocean depths, and polar and alpine regions. These permanently cold environments have been successfully colonized by a class of extremophilic microorganisms that are known as psychrophiles (which literally means cold-loving). The ability to thrive at temperatures that are close to, or below, the freezing point of water requires a vast array of adaptations to maintain the metabolic rates and sustained growth compatible with life in these severe environmental conditions.
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