The 5 Alpha-Reductase Isozyme Family: A Review of Basic Biology and Their Role in Human Diseases

Table 1

Different steroid families.

Class	Example	Number of carbon atoms
Steroid backbone	Gonane	17
Estranes	Estradiol	18
Androstanes	Testosterone	19
Pregnanes	Progesterone	21
Glucocorticoids	Cortisol	21
Mineralocorticoids	Aldosterone	21
Cholanes	Cholic acid	24
Cholestanes	Cholesterol	27