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.
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.