From the chart in the top post:
Estradiol or Estrone + 16a-OHase --> Estriol
16α-Hydroxyandrostenedione + 17-OH-SDH or aromatase --> Estriol
The enzimes 16a-OHase, 17-OH-SDH, aromatase, and 3b-OH-SDH are important for the production of estriol.
3β-OH-SDH = 3b-Hydroxysteroid dehydrogenase
17-OH-SDH = 17-Hydroxysteroid dehydrogenase
16α-OHase = 16a-Hydroxylase
estrone (E1); estradiol (E2)
Estradiol or Estrone + 16a-OHase --> Estriol
16α-Hydroxyandrostenedione + 17-OH-SDH or aromatase --> Estriol
The enzimes 16a-OHase, 17-OH-SDH, aromatase, and 3b-OH-SDH are important for the production of estriol.
3β-OH-SDH = 3b-Hydroxysteroid dehydrogenase
17-OH-SDH = 17-Hydroxysteroid dehydrogenase
16α-OHase = 16a-Hydroxylase
estrone (E1); estradiol (E2)