title: Steric considerations regarding the biodegradation of cholesterol to pregnenolone.-exclusion of (22S)-22-hydroxycholesterol and 22-ketocholesterol as intermediates.
mesh_terms: D000302:Adrenal Cortex / Q000378:metabolism; D000818:Animals; D002417:Cattle; D002474:Cell-Free System; D002784:Cholesterol / Q000378:metabolism*; D006888:Hydroxycholesterols / Q000378:metabolism; D007653:Ketocholesterols / Q000378:metabolism; D008968:Molecular Conformation; D011284:Pregnenolone / Q000096:biosynthesis*; D013237:Stereoisomerism
chemical_list: D006888:Hydroxycholesterols; D007653:Ketocholesterols; D011284:Pregnenolone; D002784:Cholesterol