3TX6:
reference: Structural and functional characterization of solute binding proteins for aromatic compounds derived from lignin: p-coumaric acid and related aromatic acids., Tan K, Chang C, Cuff M, Osipiuk J, Landorf E, Mack JC, Zerbs S, Joachimiak A, Collart FR, Proteins. 2013 Apr 22. doi: 10.1002/prot.24305. PMID: 23606130

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