1Z9H:
reference: Crystal Structure and Possible Catalytic Mechanism of Microsomal Prostaglandin E Synthase Type 2 (mPGES-2)., Yamada T, Komoto J, Watanabe K, Ohmiya Y, Takusagawa F, J Mol Biol 2005 May 20;348(5):1163-76. Epub 2005 Apr 2. PMID: 15854652

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