thus , the following androstenedione metabolizing enzymes are present in guinea-pig alveolar macrophages : 17 beta-hydroxysteroid dehydrogenase , 5 alpha-reductase , 3 beta-hydroxysteroid dehydrogenase and 3 alpha-hydroxysteroid dehydrogenase .
C0000413
3 beta-hydroxysteroid
C0048751
3 alpha-hydroxysteroid dehydrogenase