The origin of the flavonoid biosynthetic enzyme chalcone isomerase has remained a mystery. A combination of phylogenetic analysis, crystallography, biochemistry and genetics has uncovered how a stereospecific chalcone isomerase could have evolved from a nonenzymatic ancestral gene.
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Peer, W. The enzyme perfected. Nat Chem Biol 8, 607–608 (2012). https://doi.org/10.1038/nchembio.1006
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DOI: https://doi.org/10.1038/nchembio.1006