http://synbioproject.tech/cpi/applications/artemisinic-acid/
Arteseminic acid is a precursor to Artesiminin, one of the most effective anti-malarial drugs on the market. Traditionally harvested from the Chinese Sweet Wormwood Plant through an expensive and time-consuming process, this product has only been available in limited quantities in the past. Amyris has now created yeast strains that are specifically designed to produce the same substance through a standard fermentation process, which they hope will lead to significantly improved mass production in the future. Source
Genetically modified yeast fermentation.