Molecular engineering:  Unnatural design.
Researchers designed an enzyme to carry out the Diels-Alder reaction, an activity not found in nature.
Doerr
Allison
A
D055162:Biocatalysis; D015195:Drug Design; D004798:Enzymes / Q000737:chemistry / Q000378:metabolism*; D006801:Humans; D015202:Protein Engineering
D004798:Enzymes
Science. 2010 Jul 16;329(5989):309-13
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