. "The chemical reactions and pathways resulting in the formation of ergosterol, (22E)-ergosta-5,7,22-trien-3-beta-ol, a sterol found in ergot, yeast and moulds." . . . . . "ergosterol biosynthesis" . "ergosterol biosynthetic process" . "ergosterol anabolism" . "ergosterol formation" . "ergosterol synthesis" . . .