The biosynthesis pathway of ergosterol in S. cerevisiae. Synthesis intermediates, end products, and enzymes involved in ergosterol biosynthesis are indicated. Different colour indicates different modules. CoA Coenzyme A, HMG-CoA 3-hydroxy-3-methylglutaryl-CoA, P phosphate, LD lipid droplet. This figure was modified form Klug and Daum [27]