4PDK:
reference: The 40-residue insertion in Vibrio cholerae FadR facilitates binding of an additional fatty acyl-CoA ligand., Shi W, Kovacikova G, Lin W, Taylor RK, Skorupski K, Kull FJ, Nat Commun. 2015 Jan 21;6:6032. doi: 10.1038/ncomms7032. PMID: 25607896

This OCA Structure page
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