4DOO:
reference: Evolution of the chalcone-isomerase fold from fatty-acid binding to stereospecific catalysis., Ngaki MN, Louie GV, Philippe RN, Manning G, Pojer F, Bowman ME, Li L, Larsen E, Wurtele ES, Noel JP, Nature. 2012 May 13;485(7399):530-3. doi: 10.1038/nature11009. PMID: 22622584

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