Genes from the cannabis plant have been added to yeast strains to enable them to make cannabinoids, key chemicals from the plant that have therapeutic value.
The “cannayeasts” should make it possible to turn sugar into pure forms of many different cannabinoids, and to do so more cheaply and with less environmental damage than farming.
https://www.newscientist.com/article/2195103-engineered-yeast-can-brew-up-the-active-ingredients-in-cannabis-plants/, 27.2.2019
