11. But in general conclusion, cerulenin has inhibitory effects on sterol synthesis. 12. The SREBPs are then proteolytically cleaved and stimulate sterol biosynthesis. 13. Slotta, a sterol chemist, studied medical applications of snake venom. 14. The chemicals, called sterols , are found in the membranes of eukaryotes. 15. The company declined to give current sterol production figures. 16. Lipton's Take Control contains a soybean extract, plant sterol ester. 17. Some brands of margarine are high in plant sterols . 18. Plant sterols have traditionally been considered non-absorbable. 19. Other major components include fatty acids and unsaponifiable sterols . 20. Plant sterols may also act directly on intestinal cells and affect transporter proteins.