2R3X:
reference: Arginine 15 stabilizes an S(N)Ar reaction transition state and the binding of anionic ligands at the active site of human glutathione transferase A1-1., Gildenhuys S, Dobreva M, Kinsley N, Sayed Y, Burke J, Pelly S, Gordon GP, Sayed M, Sewell T, Dirr HW, Biophys Chem. 2010 Feb;146(2-3):118-25. Epub 2009 Nov 18. PMID: 19959275

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