2GTU:
reference: The enhanced affinity for thiolate anion and activation of enzyme-bound glutathione is governed by an arginine residue of human Mu class glutathione S-transferases., Patskovsky YV, Patskovska LN, Listowsky I, J Biol Chem. 2000 Feb 4;275(5):3296-304. PMID: 10652317

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