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. Author manuscript; available in PMC: 2024 Apr 27.
Published in final edited form as: Methods Enzymol. 2023 Apr 27;689:277–301. doi: 10.1016/bs.mie.2023.04.012

Fig. 1.

Fig. 1

Metabolism of Δ4-3-Ketosteroids to Tetrahydrosteroids. Left panel shows introduction of A/B cis ring fusion by 5β-reductase; right panel shows formation of tetrahydrosteroids.