Suggested Reaction 1.1.5.-

Left

11beta,21-Dihydroxy-3,20-oxo-5beta-pregnan-18-al
+Reduced thioredoxin

Right

3alpha,11beta,21-Trihydroxy-20-oxo-5beta-pregnan-18-al
+Oxidized thioredoxin

[BiSSCat | GREP ]