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Researchers create artificial enzyme that mimics the body's internal engine

at happens." He said that single turnover is like taking a single photograph of an event, while steady turnover is like shooting a movie.

Damaged enzymes

Once Collman's group had solved the continuous electron supply problem, the scientists systematically removed each of the three active centers-phenol, iron and copper-one at a time, as if the enzyme had been damaged and a specific active center was missing. "We found that great damage occurred, and that partially reduced oxygen species were produced in large amounts," Collman said. This finding led the researchers to conclude that all three active sites are essential for the proper functioning of the enzyme.

According to Devaraj, the new laboratory techniques developed in this experiment may have applications for research involving other enzymes. Understanding what makes CcO so efficient in reducing oxygen to water may even be useful to the study of fuel cells-very efficient power sources that convert chemical energy to electricity. "If we can develop better catalysts to do that reduction, we can get better fuel cells," Devaraj explained.


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Source:Stanford University


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