The water in the Yellowstone National Park hot springs shown here is around 160掳F (70掳C). Biologists assumed that no species of organisms couldlive in water above about 130掳F (55掳C), so they were surprised to find several species of bacteria there, now called thermophiles(鈥渉eat-lovers鈥). You鈥檝e learned in this chapter how an enzyme from one species, Thermus aquaticus, made feasible one of the most important DNA-based techniques used in labs today.Identify the enzyme, and indicate the value of its being isolated from a thermophile. Suggest other reasons why enzymes from this bacterium (or other thermophiles) might also be valuable.
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