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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: J Mol Endocrinol. 2020 Jan;64(1):R21–R43. doi: 10.1530/JME-19-0105

Figure 3.

Figure 3

Human ovarian progestin and estrogen biosynthetic pathways. 17β-HSD1, 17β-hydroxysteroid dehydrogenase type 1, also called Hydroxysteroid 17-Beta Dehydrogenase 1 (HSD17B1); 17β-HSD3/5, 17β-hydroxysteroid dehydrogenase type 3/17β-hydroxysteroid dehydrogenase type 5, also called Hydroxysteroid 17-Beta Dehydrogenase 3/Hydroxysteroid 17-Beta Dehydrogenase 5 (HSD17B3/HSD17B5); CYT B5, cytochrome B5 protein, also called Cytochrome B5 Type B (CYB5B gene); P450arom, cytochrome P450 aromatase, also called Cytochrome P450 Family 19 Subfamily A Member 1 (CYP19A1 gene); P450c17, cytochrome P450c17 (is a single enzyme mediating both 17α-hydroxylase/17,20 lyase activities), also called Cytochrome P450 Family 17 Subfamily A Member 1 (CYP17A1 gene); P450scc, cytochrome P450scc side chain cleavage enzyme, also called cytochrome P450 family 11 Subfamily A Member 1 (CYP11A1 gene); StAR, steroidogenic acute regulatory protein (STAR gene).