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Pregnenolone Illustration and Icon
Pregnenolone
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A 2D ball-and-stick diagram depicts a steroid molecule with a four-ring cyclopentanoperhydrophenanthrene core bearing a 3β-hydroxyl group and a 20-ketone side chain, characteristic of pregnenolone (P5). In biochemistry and endocrinology, this small-molecule lipid functions as a cholesterol-derived precursor in steroidogenesis, enabling biosynthesis of progesterone, glucocorticoids, mineralocorticoids, and sex steroids. The illustration represents a molecule within a metabolic pathway hierarchy, showing covalent bonding and unsaturation in the fused-ring structure.
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