4AT0:
reference: Structure and Catalytic Mechanism of 3-Ketosteroid-{Delta}4-(5alpha)-dehydrogenase from Rhodococcus jostii RHA1 Genome., van Oosterwijk N, Knol J, Dijkhuizen L, van der Geize R, Dijkstra BW, J Biol Chem. 2012 Sep 7;287(37):30975-83. Epub 2012 Jul 24. PMID: 22833669

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