3CV6:
reference: Structure of the G225P/G226P mutant of mouse 3(17)alpha-hydroxysteroid dehydrogenase (AKR1C21) ternary complex: implications for the binding of inhibitor and substrate., Dhagat U, Endo S, Mamiya H, Hara A, El-Kabbani O, Acta Crystallogr D Biol Crystallogr. 2009 Mar;65(Pt 3):257-65. Epub 2009, Feb 20. PMID: 19237748

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