1OGZ:
reference: The conserved cis-Pro39 residue plays a crucial role in the proper positioning of the catalytic base Asp38 in ketosteroid isomerase from Comamonas testosteroni., Nam GH, Cha SS, Yun YS, Oh YH, Hong BH, Lee HS, Choi KY, Biochem J. 2003 Oct 15;375(Pt 2):297-305. PMID: 12852789

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