aldosterone alkaloid amino acid anabolic steroid androgen androstanediol androstenedione androsterone animal atherosclerosis batrachotoxin biochemistry brassicasterol brassinosteroid carbohydrate carbon carotenoid cell membrane central nervous system cholesterol cholic acid corticosteroid cortisol cycloartenol dehydroepiandrosterone digital object identifier dihydrotestosterone dimethylallyl pyrophosphate drug electrolyte ergocalciferol ergosterol estradiol estriol estrogen estrone flavonoid functional group fungus geranyl pyrophosphate glucocorticoid glycoprotein glycoside immune system insect isopentenyl pyrophosphate kidney lanosterol lipid list of steroid abbreviations metabolism mineralocorticoid mitochondrion monosaccharide ovary peptide phytosterol placenta plant polyketide prednisone pregnane pregnenolone progestagen progesterone protein reproduction sex steroid sexual differentiation squalene steroid hormone sterol stigmasterol terpene terpenoid testosterone tetrapyrrole vertebrate